document.write( "Question 698163: equation of the parabola with vertex (-6,2) \n" ); document.write( "
Algebra.Com's Answer #430484 by MathLover1(20850)\"\" \"About 
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the equation for a parabola can also be written in \"vertex form\":\r
\n" ); document.write( "\n" ); document.write( "\"y+=+a%28x+-h%29%5E2+%2B+k\"\r
\n" ); document.write( "\n" ); document.write( "In this equation, the vertex of the parabola is the point (\"h\", \"k\").\r
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\n" ); document.write( "\n" ); document.write( "if (\"h\", \"k\")=(\"-6\", \"2\"), than\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+a%28x-%28-5%29%29%5E2+%2B+2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+a%28x+%2B5%29%5E2+%2B+2\".........the coefficient of \"x\" here is \"-2ah\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+k+%2B+sqrt%28-4h%29\"... to find the \"y-intercept\", set \"x+=+0\" \r
\n" ); document.write( "\n" ); document.write( "\"y+=+2+%2B+sqrt%28-4%28-6%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2+%2B+sqrt%2824%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2+%2B+4.9\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+6.9\"\r
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\n" ); document.write( "\n" ); document.write( "next, we find \"a\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+h+%2B+k%5E2%2F4a+\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+-6+%2B+2%5E2%2F4a\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=a-6\".......since \"y+=+6.9\" plug both in \"y+=+a%28x-h%29%5E2+%2B+k\" and solve for \"a\"\r
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\n" ); document.write( "\n" ); document.write( "\"6.9=+a%28a-6+%2B6%29%5E2+%2B+2\"\r
\n" ); document.write( "\n" ); document.write( "\"6.9=+a%2Aa%5E2+%2B+2\"\r
\n" ); document.write( "\n" ); document.write( "\"6.9-2=+a%5E3\"\r
\n" ); document.write( "\n" ); document.write( "\"4.9=+a%5E3\"\r
\n" ); document.write( "\n" ); document.write( "\"root%283%2C4.9%29=+a\"\r
\n" ); document.write( "\n" ); document.write( "\"a=+2.214\"\r
\n" ); document.write( "\n" ); document.write( "equation will be:\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2.214%28x+%2B6%29%5E2+%2B+2\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2.214%28x%5E2%2B12x+%2B36%29+%2B+2\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2.214x%5E2%2B26.568x+%2B79.704+%2B+2\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+2.214x%5E2%2B26.568x+%2B81.704+\"\r
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\n" ); document.write( "\n" ); document.write( "check it on a graph:\r
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