document.write( "Question 395439: Give exact and approximate solutions to three decimal places.
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Algebra.Com's Answer #280628 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"x%5E2%2B12x%2B36=64\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B12x%2B36-64=0\" Subtract 64 from both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B12x-28=0\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"x%5E2%2B12x-28\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=1\", \"B=12\", and \"C=-28\"\r
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\n" ); document.write( "\n" ); document.write( "Let's use the quadratic formula to solve for \"x\":\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%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( "\"x+=+%28-%2812%29+%2B-+sqrt%28+%2812%29%5E2-4%281%29%28-28%29+%29%29%2F%282%281%29%29\" Plug in \"A=1\", \"B=12\", and \"C=-28\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+144-4%281%29%28-28%29+%29%29%2F%282%281%29%29\" Square \"12\" to get \"144\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+144--112+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%28-28%29\" to get \"-112\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+144%2B112+%29%29%2F%282%281%29%29\" Rewrite \"sqrt%28144--112%29\" as \"sqrt%28144%2B112%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+256+%29%29%2F%282%281%29%29\" Add \"144\" to \"112\" to get \"256\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+256+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+16%29%2F%282%29\" Take the square root of \"256\" to get \"16\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B+16%29%2F%282%29\" or \"x+=+%28-12+-+16%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%284%29%2F%282%29\" or \"x+=++%28-28%29%2F%282%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+2\" or \"x+=+-14\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+2\" or \"x+=+-14\" \r
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\n" ); document.write( "\n" ); document.write( "If you need more help, email me at jim_thompson5910@hotmail.com\r
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\n" ); document.write( "\n" ); document.write( "Also, feel free to check out my tutoring website\r
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\n" ); document.write( "\n" ); document.write( "Jim
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