x&sup2; + y&sup2; - 6x + 6y - 9 = 0

x&sup2; + y&sup2; + 6x + 6y - 3 = 0

x&sup2; + y&sup2; - 6x - 6y - 9 = 0

x&sup2; + y&sup2; - 6x - 6y + 14 = 0

x&sup2; + y&sup2; - 6x - 6y = 0

Diketahui dua lingkaran dengan <img align="middle" alt="begin mathsize 14px style text L end text subscript 2 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«msub»«mtext»L«/mtext»«mn»2«/mn»«/msub»«/mstyle»«/math»" data-latex="\style{font-size:14px}{{\text{L}}_2}" data-latex="\style{font-size:14px}{{\text{L}}_2}" height="15" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAPCAYAAAA/I0V3AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAAFFJREFUeNpjYICA/wxkgFFNtNKUBcSfgPgxEPsQq6kLiNmA2BaIn6JrwoaRAQsQ/yDVCzlA3EeKBkcg3gS1jSigBsRboP4iGuyHaiQ5OlACBwB1XhvdXqRFlQAAAId0RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bXN0eWxlIG1hdGhzaXplPSIxNHB4Ij48bXN1Yj48bXRleHQ+TDwvbXRleHQ+PG1uPjI8L21uPjwvbXN1Yj48L21zdHlsZT48L21hdGg+AQeBcQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -5px;" width="13" /> saling lepas di dalam dan sepusat dengan <img align="middle" alt="begin mathsize 14px style text L end text subscript 1 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«msub»«mtext»L«/mtext»«mn»1«/mn»«/msub»«/mstyle»«/math»" data-latex="\style{font-size:14px}{{\text{L}}_1}" data-latex="\style{font-size:14px}{{\text{L}}_1}" height="15" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAPCAYAAAA/I0V3AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAACdJREFUeNpjYICA/wxkgFFNtNJkCcT7SdW0F5f8fxx4NEpwBBIYAABeQxme2LmK4AAAAId0RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bXN0eWxlIG1hdGhzaXplPSIxNHB4Ij48bXN1Yj48bXRleHQ+TDwvbXRleHQ+PG1uPjE8L21uPjwvbXN1Yj48L21zdHlsZT48L21hdGg+pA/qHQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -5px;" width="13" />. Jika lingkaran&nbsp; <img align="middle" alt="begin mathsize 14px style text L end text subscript 1 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«msub»«mtext»L«/mtext»«mn»1«/mn»«/msub»«/mstyle»«/math»" height="15" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAPCAYAAAA/I0V3AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAACdJREFUeNpjYICA/wxkgFFNtNJkCcT7SdW0F5f8fxx4NEpwBBIYAABeQxme2LmK4AAAAId0RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bXN0eWxlIG1hdGhzaXplPSIxNHB4Ij48bXN1Yj48bXRleHQ+TDwvbXRleHQ+PG1uPjE8L21uPjwvbXN1Yj48L21zdHlsZT48L21hdGg+pA/qHQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -5px;" width="13" /> menyinggung sumbu-x positif dan sumbu-y positif dengan jari-jari 3&nbsp;satuan panjang, maka persamaan untuk lingkaran <img align="middle" alt="begin mathsize 14px style text L end text subscript 2 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«msub»«mtext»L«/mtext»«mn»2«/mn»«/msub»«/mstyle»«/math»" height="15" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAPCAYAAAA/I0V3AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAAFFJREFUeNpjYICA/wxkgFFNtNKUBcSfgPgxEPsQq6kLiNmA2BaIn6JrwoaRAQsQ/yDVCzlA3EeKBkcg3gS1jSigBsRboP4iGuyHaiQ5OlACBwB1XhvdXqRFlQAAAId0RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bXN0eWxlIG1hdGhzaXplPSIxNHB4Ij48bXN1Yj48bXRleHQ+TDwvbXRleHQ+PG1uPjI8L21uPjwvbXN1Yj48L21zdHlsZT48L21hdGg+AQeBcQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -5px;" width="13" /> yang mungkin adalah &hellip;.

<img align="middle" alt="begin mathsize 12px style minus end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mo»-«/mo»«/mstyle»«/math»" height="6" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAGCAYAAAAVMmT4AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAFsE5mEQAAABBJREFUeNpjYECA/3jwyAAAtK4G+lj5+zQAAABqdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1zdHlsZSBtYXRoc2l6ZT0iMTJweCI+PG1vPi08L21vPjwvbXN0eWxlPjwvbWF0aD6DTsX5AAAAAElFTkSuQmCC" style="max-width: none; vertical-align: -1px;" width="11" />80

<img align="middle" alt="begin mathsize 12px style minus end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mo»-«/mo»«/mstyle»«/math»" height="6" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAGCAYAAAAVMmT4AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAFsE5mEQAAABBJREFUeNpjYECA/3jwyAAAtK4G+lj5+zQAAABqdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1zdHlsZSBtYXRoc2l6ZT0iMTJweCI+PG1vPi08L21vPjwvbXN0eWxlPjwvbWF0aD6DTsX5AAAAAElFTkSuQmCC" style="max-width: none; vertical-align: -1px;" width="11" />67

Perhatikan gambar berikut!

<img src="data:image/png;base64,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" />

Kedua lingkaran di atas memenuhi persamaan&nbsp;sebagai berikut.

<img align="middle" alt="begin mathsize 14px style straight L subscript 1 colon space straight x squared plus straight y squared minus 4 straight x plus 4 straight y equals 1
straight L subscript 2 colon space straight x squared plus straight y squared minus 20 straight x minus 8 straight y equals k end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msub»«mi mathvariant=¨normal¨»L«/mi»«mn»1«/mn»«/msub»«mo»:«/mo»«mo»§#160;«/mo»«msup»«mi mathvariant=¨normal¨»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi mathvariant=¨normal¨»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mi mathvariant=¨normal¨»x«/mi»«mo»+«/mo»«mn»4«/mn»«mi mathvariant=¨normal¨»y«/mi»«mo»=«/mo»«mn»1«/mn»«mspace linebreak=¨newline¨/»«msub»«mi mathvariant=¨normal¨»L«/mi»«mn»2«/mn»«/msub»«mo»:«/mo»«mo»§#160;«/mo»«msup»«mi mathvariant=¨normal¨»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi mathvariant=¨normal¨»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»20«/mn»«mi mathvariant=¨normal¨»x«/mi»«mo»-«/mo»«mn»8«/mn»«mi mathvariant=¨normal¨»y«/mi»«mo»=«/mo»«mi»k«/mi»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{{\mathrm L}_1:\;\mathrm x^2+\mathrm y^2-4\mathrm x+4\mathrm y=1\\{\mathrm L}_2:\;\mathrm x^2+\mathrm y^2-20\mathrm x-8\mathrm y=k}" height="46" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -23px;" width="161" />

Nilai <img align="middle" alt="begin mathsize 14px style k end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mi»k«/mi»«/mstyle»«/math»" data-latex="\style{font-size:14px}k" height="11" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAALCAYAAACtWacbAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAAHNJREFUeNpjYECAICBeykAA1ANxOSFFq4A4gJCiW0AsDWVbAvEWIBZFVsAExN+g7GSoAh50U8yB+DAQz4Ray4LNqkggXgPEZ4A4B5d7JgFxGtQNd4HYHpuidUDsBWUrAfEVJE/AwTsg5kDig3x3EE0MPwAAwUARokPz7OIAAABqdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1zdHlsZSBtYXRoc2l6ZT0iMTRweCI+PG1pPms8L21pPjwvbXN0eWxlPjwvbWF0aD6j4CCNAAAAAElFTkSuQmCC" style="max-width: none; vertical-align: -1px;" width="9" />&nbsp;yang memenuhi adalah &hellip;.

Diketahui beberapa persamaan lingkaran sebagai berikut.

<ol>
	<li><img align="middle" alt="begin mathsize 14px style x squared plus y squared minus 4 x minus 6 y minus 51 equals 0 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»4«/mn»«mi»x«/mi»«mo»-«/mo»«mn»6«/mn»«mi»y«/mi»«mo»-«/mo»«mn»51«/mn»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{x^2+y^2-4x-6y-51=0}" height="17" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -3px;" width="166" /></li>
	<li><img align="middle" alt="begin mathsize 14px style x squared plus y squared minus 32 x plus 4 y plus 116 equals 0 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»32«/mn»«mi»x«/mi»«mo»+«/mo»«mn»4«/mn»«mi»y«/mi»«mo»+«/mo»«mn»116«/mn»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{x^2+y^2-32x+4y+116=0}" height="17" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -3px;" width="186" /></li>
	<li><img align="middle" alt="begin mathsize 14px style x squared plus y squared minus 8 x minus 2 y minus 83 equals 0 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»8«/mn»«mi»x«/mi»«mo»-«/mo»«mn»2«/mn»«mi»y«/mi»«mo»-«/mo»«mn»83«/mn»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{x^2+y^2-8x-2y-83=0}" height="17" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -3px;" width="166" /></li>
	<li><img align="middle" alt="begin mathsize 14px style x squared plus y squared minus 22 x plus 4 y plus 114 equals 0 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»22«/mn»«mi»x«/mi»«mo»+«/mo»«mn»4«/mn»«mi»y«/mi»«mo»+«/mo»«mn»114«/mn»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{x^2+y^2-22x+4y+114=0}" height="17" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAALoAAAARCAYAAABq1bbcAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAOJ5y/mQAAAptJREFUeNrtWU0oRFEUvkmysJEkWSjJQhZKkiTZWUiy0WQlO9lbWdhKVtNsLCRJSZLsJAtJStMkScpCsrKz0CT1nMN5enObcf/evY9596uvaW7HHPeb7557zhvG1DAPfAU+AceZGySR0yPlWAHWAYeBz1Wc08PjC7XAYgpyeqQcC8C1FOT0SDFGgYdUYUUIEsgpAvb5Z8B3es0BGzRiTKGqzUSMeqrk7wIuAQuGMbb2EcUQME/fW4HaXS3gho6oZ2aOjK6aUwT8rBFgDb2fA+5pxLg0eiPwNiGjbwFnBfEyMbb2EaIDeAfso/f4ek/ryjgl4zGHRlfNqQo081sMMTaNjkbKJGR0lfgggX2EyFJBimKW1ktwABzkTt8xsJXbSJRxiPNIuXhcALs1cqqiHfigGSOjmanRsI3a/eVvRPr9FaOL9sF+8ZmMB/D7aebWmkifErQBr6h61dFV3akhhuo/iad8ilvDk7kaU04RsPef1IxR0UxHGzTwNX1hzFC/wFArE6PL7MMUHxXW38stLhI3gL2OrsdpGvaip/DGwvDHAz9/m4YjkxhdzWS02eRMHMSon8uKLrMPW0YvVmroP2gQc9UHttJpD7EOnLFs8hbgjuDGkokx0UzWOKLKq6ufS6Or3iA6N899mdaluVzLiYvnVCGWHQ88D3S99bPvx3k2gXn2K/S1KjGmmgUx6qmjXxLDqM2KnqXhkx9Gc/wVjUNUT6Qq9Ds0+gZdbXnBABUHDiP7NIkx1SxOo+voV21GDx8vhu3jABWAn8eLOEThc+Mhrs+7BNYzN8CK+KIwgJoePtF1KIpJSrMgAf1kWgcbg60O8AeiAg2geWbwg5EtYBV6djCAViu8fv8EOJVnvAxev2rGGPDEy+D1s4lPhYoeIgGQkeYAAAETdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1zdHlsZSBtYXRoc2l6ZT0iMTRweCI+PG1zdXA+PG1pPng8L21pPjxtbj4yPC9tbj48L21zdXA+PG1vPis8L21vPjxtc3VwPjxtaT55PC9taT48bW4+MjwvbW4+PC9tc3VwPjxtbz4tPC9tbz48bW4+MjI8L21uPjxtaT54PC9taT48bW8+KzwvbW8+PG1uPjQ8L21uPjxtaT55PC9taT48bW8+KzwvbW8+PG1uPjExNDwvbW4+PG1vPj08L21vPjxtbj4wPC9tbj48L21zdHlsZT48L21hdGg+cKWPQAAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -3px;" width="186" /></li>
</ol>

Lingkaran di atas yang tegak lurus dengan lingkaran <img align="middle" alt="begin mathsize 14px style x squared plus y squared minus 2 x plus 4 y minus 76 equals 0 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»2«/mn»«mi»x«/mi»«mo»+«/mo»«mn»4«/mn»«mi»y«/mi»«mo»-«/mo»«mn»76«/mn»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" data-latex="\style{font-size:14px}{x^2+y^2-2x+4y-76=0}" height="17" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -3px;" width="167" />&nbsp;ditunjukkan oleh nomor&nbsp;&hellip;.

Diketahui dua buah persamaan lingkaran sebagai berikut.

<img align="middle" alt="begin mathsize 14px style L subscript 1 colon space x squared plus y squared minus 8 x plus 16 y minus 1 equals 0
L subscript 2 colon space x squared plus y squared plus 10 x minus 8 y plus k equals 0 end style" class="Wirisformula" data-latex="\style{font-size:14px}{L_1:\;x^2+y^2-8x+16y-1=0\\L_2:\;x^2+y^2+10x-8y+k=0}" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msub»«mi»L«/mi»«mn»1«/mn»«/msub»«mo»:«/mo»«mo»§#160;«/mo»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»-«/mo»«mn»8«/mn»«mi»x«/mi»«mo»+«/mo»«mn»16«/mn»«mi»y«/mi»«mo»-«/mo»«mn»1«/mn»«mo»=«/mo»«mn»0«/mn»«mspace linebreak=¨newline¨/»«msub»«mi»L«/mi»«mn»2«/mn»«/msub»«mo»:«/mo»«mo»§#160;«/mo»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»y«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«mn»10«/mn»«mi»x«/mi»«mo»-«/mo»«mn»8«/mn»«mi»y«/mi»«mo»+«/mo»«mi»k«/mi»«mo»=«/mo»«mn»0«/mn»«/mrow»«/mstyle»«/math»" height="46" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -23px;" width="191" />

Agar kedua lingkaran di atas saling lepas di luar, maka nilai <img align="middle" alt="begin mathsize 14px style k end style" class="Wirisformula" data-latex="\style{font-size:14px}k" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mi»k«/mi»«/mstyle»«/math»" height="11" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAALCAYAAACtWacbAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAKIPF7gAAAAHNJREFUeNpjYECAICBeykAA1ANxOSFFq4A4gJCiW0AsDWVbAvEWIBZFVsAExN+g7GSoAh50U8yB+DAQz4Ray4LNqkggXgPEZ4A4B5d7JgFxGtQNd4HYHpuidUDsBWUrAfEVJE/AwTsg5kDig3x3EE0MPwAAwUARokPz7OIAAABqdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1zdHlsZSBtYXRoc2l6ZT0iMTRweCI+PG1pPms8L21pPjwvbXN0eWxlPjwvbWF0aD6j4CCNAAAAAElFTkSuQmCC" style="max-width: none; vertical-align: -1px;" width="9" /> yang memenuhi adalah &hellip;.