document.write( "Question 981419: Solve or answer the questions regarding equations. Show work.\r
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Algebra.Com's Answer #602487 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Instead of solving your problem, I'll solve one exactly in every\r\n" );
document.write( "detail like your problem.  That is to prevent students from ignoring \r\n" );
document.write( "the work we do here and submitting only our answers.\r\n" );
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document.write( "So I'll do this one step by step which is exactly like your problem.\r\n" );
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document.write( "\"7sqrt%28x%29-x\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "Isolate the square root term:\r\n" );
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document.write( "\"7sqrt%28x%29\"\"%22%22=%22%22\"\"12%2Bx\"\r\n" );
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document.write( "Square both sides:\r\n" );
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document.write( "\"%287sqrt%28x%29%29%5E2\"\"%22%22=%22%22\"\"%2812%2Bx%29%5E2\"\r\n" );
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document.write( "\"49x%5E2\"\"%22%22=%22%22\"\"144%2B24x%2Bx%5E2\"\r\n" );
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document.write( "\"%220%22\"\"%22%22=%22%22\"\"x%5E2-25x%2B144\"\r\n" );
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document.write( "\"%220%22\"\"%22%22=%22%22\"\"%28x-9%29%28x-16%29\"\r\n" );
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document.write( "\"x-9\"\"%22%22=%22%22\"\"%220%22\";  \"x-16\"\"%22%22=%22%22\"\"%220%22\"\r\n" );
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document.write( "\"x=9\"; \"x=16\"\r\n" );
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document.write( "We must always check problems for extraneous roots when we\r\n" );
document.write( "have squared both sides:\r\n" );
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document.write( "Check x=9\r\n" );
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document.write( "\"7sqrt%289%29-9\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"7%283%29-9\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"21-9\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"12\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "So 9 is a solution:\r\n" );
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document.write( "Check x=16\r\n" );
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document.write( "\"7sqrt%2816%29-16\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"7%284%29-16\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"28-16\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "\"12\"\"%22%22=%22%22\"\"12\"\r\n" );
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document.write( "So 16 is also a solution.\r\n" );
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document.write( "Now do your problem exactly like this one.\r\n" );
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document.write( "Edwin
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