document.write( "Question 211375: give exact and approximate solutions to three decimal places for
\n" ); document.write( "y^2-12y+36=100
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Algebra.Com's Answer #159741 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"y%5E2-12y%2B36=100\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"y%5E2-12y%2B36-100=0\" Get every term to the left side.\r
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\n" ); document.write( "\n" ); document.write( "\"y%5E2-12y-64=0\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"y%5E2-12y-64\" is in the form of \"Ay%5E2%2BBy%2BC\" where \"A=1\", \"B=-12\", and \"C=-64\"\r
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\n" ); document.write( "\n" ); document.write( "Let's use the quadratic formula to solve for \"y\":\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%28-B+%2B-+sqrt%28+B%5E2-4AC+%29%29%2F%282A%29\" Start with the quadratic formula\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%28-%28-12%29+%2B-+sqrt%28+%28-12%29%5E2-4%281%29%28-64%29+%29%29%2F%282%281%29%29\" Plug in \"A=1\", \"B=-12\", and \"C=-64\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+%28-12%29%5E2-4%281%29%28-64%29+%29%29%2F%282%281%29%29\" Negate \"-12\" to get \"12\". \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+144-4%281%29%28-64%29+%29%29%2F%282%281%29%29\" Square \"-12\" to get \"144\". \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+144--256+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%28-64%29\" to get \"-256\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+144%2B256+%29%29%2F%282%281%29%29\" Rewrite \"sqrt%28144--256%29\" as \"sqrt%28144%2B256%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+400+%29%29%2F%282%281%29%29\" Add \"144\" to \"256\" to get \"400\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+sqrt%28+400+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B-+20%29%2F%282%29\" Take the square root of \"400\" to get \"20\". \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2812+%2B+20%29%2F%282%29\" or \"y+=+%2812+-+20%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%2832%29%2F%282%29\" or \"y+=++%28-8%29%2F%282%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"y+=+16\" or \"y+=+-4\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"y+=+16\" or \"y+=+-4\" \r
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