document.write( "Question 189008: how would you solve for 8x squared – 12x = 11 \n" ); document.write( "
Algebra.Com's Answer #141753 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"8x%5E2-12x=11\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"8x%5E2-12x-11=0\" Subtract 11 from both sides.\r
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\n" ); document.write( "\n" ); document.write( "Notice we have a quadratic equation in the form of \"ax%5E2%2Bbx%2Bc\" where \"a=8\", \"b=-12\", and \"c=-11\"\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-%28-12%29+%2B-+sqrt%28+%28-12%29%5E2-4%288%29%28-11%29+%29%29%2F%282%288%29%29\" Plug in \"a=8\", \"b=-12\", and \"c=-11\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+%28-12%29%5E2-4%288%29%28-11%29+%29%29%2F%282%288%29%29\" Negate \"-12\" to get \"12\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+144-4%288%29%28-11%29+%29%29%2F%282%288%29%29\" Square \"-12\" to get \"144\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+144--352+%29%29%2F%282%288%29%29\" Multiply \"4%288%29%28-11%29\" to get \"-352\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+144%2B352+%29%29%2F%282%288%29%29\" Rewrite \"sqrt%28144--352%29\" as \"sqrt%28144%2B352%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+496+%29%29%2F%282%288%29%29\" Add \"144\" to \"352\" to get \"496\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+sqrt%28+496+%29%29%2F%2816%29\" Multiply \"2\" and \"8\" to get \"16\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812+%2B-+4%2Asqrt%2831%29%29%2F%2816%29\" Simplify the square root (note: If you need help with simplifying square roots, check out this solver) \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2812%2B4%2Asqrt%2831%29%29%2F%2816%29\" or \"x+=+%2812-4%2Asqrt%2831%29%29%2F%2816%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%283%2Bsqrt%2831%29%29%2F%284%29\" or \"x+=+%283-sqrt%2831%29%29%2F%284%29\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "So the answers are \"x+=+%283%2Bsqrt%2831%29%29%2F%284%29\" or \"x+=+%283-sqrt%2831%29%29%2F%284%29\"
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