document.write( "Question 195572This question is from textbook McDougal Littell Algebra 1
\n" ); document.write( ": Please help me solve this equation: x+3/x-5=56-3x/x^2-13x+40 \n" ); document.write( "
Algebra.Com's Answer #146682 by jim_thompson5910(35256)\"\" \"About 
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\"%28x%2B3%29%2F%28x-5%29=%2856-3x%29%2F%28x%5E2-13x%2B40%29\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"%28x%2B3%29%2F%28x-5%29=%2856-3x%29%2F%28%28x-5%29%28x-8%29%29\" Factor\r
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\n" ); document.write( "\n" ); document.write( " Multiply every term on both sides by the LCD \"%28x-5%29%28x-8%29\". Doing this will eliminate all of the fractions.\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-8%29%28x%2B3%29=56-3x\" Cancel out and simplify.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-5x-24=56-3x\" FOIL\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-5x-24-56%2B3x=0\" Get all terms to the left side.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-2x-80=0\" Combine like terms.\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=1\", \"b=-2\", and \"c=-80\"\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-%28-2%29+%2B-+sqrt%28+%28-2%29%5E2-4%281%29%28-80%29+%29%29%2F%282%281%29%29\" Plug in \"a=1\", \"b=-2\", and \"c=-80\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+%28-2%29%5E2-4%281%29%28-80%29+%29%29%2F%282%281%29%29\" Negate \"-2\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+4-4%281%29%28-80%29+%29%29%2F%282%281%29%29\" Square \"-2\" to get \"4\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+4--320+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%28-80%29\" to get \"-320\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+4%2B320+%29%29%2F%282%281%29%29\" Rewrite \"sqrt%284--320%29\" as \"sqrt%284%2B320%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+324+%29%29%2F%282%281%29%29\" Add \"4\" to \"320\" to get \"324\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+sqrt%28+324+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B-+18%29%2F%282%29\" Take the square root of \"324\" to get \"18\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282+%2B+18%29%2F%282%29\" or \"x+=+%282+-+18%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2820%29%2F%282%29\" or \"x+=++%28-16%29%2F%282%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+10\" or \"x+=+-8\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So the answers are \"x+=+10\" or \"x+=+-8\"
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