document.write( "Question 157994: Find the imaginary solutions: x^2 + 20x + 101 = 0 \n" ); document.write( "
Algebra.Com's Answer #116399 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B20x%2B101=0\" Start with the given equation.\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=20\", and \"c=101\"\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-%2820%29+%2B-+sqrt%28+%2820%29%5E2-4%281%29%28101%29+%29%29%2F%282%281%29%29\" Plug in \"a=1\", \"b=20\", and \"c=101\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B-+sqrt%28+400-4%281%29%28101%29+%29%29%2F%282%281%29%29\" Square \"20\" to get \"400\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B-+sqrt%28+400-404+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%28101%29\" to get \"404\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B-+sqrt%28+-4+%29%29%2F%282%281%29%29\" Subtract \"404\" from \"400\" to get \"-4\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B-+sqrt%28+-4+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B-+2%2Ai%29%2F%282%29\" Take the square root of \"-4\" to get \"2%2Ai\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20+%2B+2%2Ai%29%2F%282%29\" or \"x+=+%28-20+-+2%2Ai%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-20%29%2F%282%29+%2B+%282%2Ai%29%2F%282%29\" or \"x+=++%28-20%29%2F%282%29+-+%282%2Ai%29%2F%282%29\" Break up the fraction for each case. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+-10%2Bi\" or \"x+=++-10-i\" Reduce. \r
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\n" ); document.write( "\n" ); document.write( "So the answers are \"x+=+-10%2Bi\" or \"x+=++-10-i\" \r
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