document.write( "Question 221453: Give exact and approximate solutions to three decimal places. x^2-5x+5=0. Find the x-intercepts.
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Algebra.Com's Answer #166089 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\"x%5E2-5x%2B5=0\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"x%5E2-5x%2B5\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=1\", \"B=-5\", and \"C=5\"\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-%28-5%29+%2B-+sqrt%28+%28-5%29%5E2-4%281%29%285%29+%29%29%2F%282%281%29%29\" Plug in \"A=1\", \"B=-5\", and \"C=5\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285+%2B-+sqrt%28+%28-5%29%5E2-4%281%29%285%29+%29%29%2F%282%281%29%29\" Negate \"-5\" to get \"5\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285+%2B-+sqrt%28+25-4%281%29%285%29+%29%29%2F%282%281%29%29\" Square \"-5\" to get \"25\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285+%2B-+sqrt%28+25-20+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%285%29\" to get \"20\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285+%2B-+sqrt%28+5+%29%29%2F%282%281%29%29\" Subtract \"20\" from \"25\" to get \"5\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285+%2B-+sqrt%28+5+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%285%2Bsqrt%285%29%29%2F%282%29\" or \"x+=+%285-sqrt%285%29%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+%285%2Bsqrt%285%29%29%2F%282%29\" or \"x+=+%285-sqrt%285%29%29%2F%282%29\" \r
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\n" ); document.write( "\n" ); document.write( "which approximate to \"x=3.618\" or \"x=1.382\" \r
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\n" ); document.write( "\n" ); document.write( "If you need more help with this subject, check out this solver.
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