document.write( "Question 336170: Solve the equation 2x + 5 = -1/x \n" ); document.write( "
Algebra.Com's Answer #241055 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"2x+%2B+5+=+-1%2Fx\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"2x%5E2+%2B+5x+=+-1\" Multiply both EVERY term by the LCD x to clear out the fractions.\r
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\n" ); document.write( "\n" ); document.write( "\"2x%5E2+%2B+5x+%2B1=+0\" Add 1 to both sides.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"2x%5E2%2B5x%2B1\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=2\", \"B=5\", and \"C=1\"\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-%285%29+%2B-+sqrt%28+%285%29%5E2-4%282%29%281%29+%29%29%2F%282%282%29%29\" Plug in \"A=2\", \"B=5\", and \"C=1\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+25-4%282%29%281%29+%29%29%2F%282%282%29%29\" Square \"5\" to get \"25\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+25-8+%29%29%2F%282%282%29%29\" Multiply \"4%282%29%281%29\" to get \"8\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+17+%29%29%2F%282%282%29%29\" Subtract \"8\" from \"25\" to get \"17\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+17+%29%29%2F%284%29\" Multiply \"2\" and \"2\" to get \"4\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5%2Bsqrt%2817%29%29%2F%284%29\" or \"x+=+%28-5-sqrt%2817%29%29%2F%284%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+%28-5%2Bsqrt%2817%29%29%2F%284%29\" or \"x+=+%28-5-sqrt%2817%29%29%2F%284%29\" \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 website. \r
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