document.write( "Question 68138: I had a problem I was working on with the quadratic equation rule.\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B4x%2B2=0\"\r
\n" ); document.write( "\n" ); document.write( "Eventually I worked the problem down to \"x=+-2+%2Bor-+radical+8\"\r
\n" ); document.write( "\n" ); document.write( "The answer I'm suppose to get from there is \"-2+%2Bor-+radical+2\"\r
\n" ); document.write( "\n" ); document.write( "I don't see how this is possible.
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Algebra.Com's Answer #48410 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
I had a problem I was working on with the quadratic equation rule.
\n" ); document.write( "This is how you solve it by completing the square.
\n" ); document.write( "\"x%5E2%2B4x%2B2=0\"
\n" ); document.write( "\"x%5E2%2B4x%2B2-2=0-2\"
\n" ); document.write( "\"x%5E2%2B4x=-2\"
\n" ); document.write( "\"x%5E2%2B4x%2B4=4-2\"
\n" ); document.write( "\"x%5E2%2B4x%2B4=2\"
\n" ); document.write( "\"%28x%2B2%29%5E2=2\"
\n" ); document.write( "\"sqrt%28%28x%2B2%29%5E2%29=%2B-sqrt%282%29\"
\n" ); document.write( "\"x%2B2=%2B-sqrt%282%29\"
\n" ); document.write( "\"x%2B2-2=-2%2B-sqrt%282%29\"
\n" ); document.write( "\"highlight%28x=-2%2B-sqrt%282%29%29\"
\n" ); document.write( ":
\n" ); document.write( "If you were supposed to solve it using the quadratic formula:
\n" ); document.write( "\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a\"
\n" ); document.write( "a=1, b=4 and c=2
\n" ); document.write( "\"x=%28-4%2B-sqrt%28%284%29%5E2-4%281%29%282%29%29%29%2F%282%281%29%29\"
\n" ); document.write( "\"x=%28-4%2B-sqrt%2816-8%29%29%2F2\"
\n" ); document.write( "\"x=%28-4%2B-sqrt%288%29%29%2F2\"
\n" ); document.write( "\"x=%28-4%2B-sqrt%284%29%2Asqrt%282%29%29%2F2\"
\n" ); document.write( "\"x=%28-4%2Bor-2%2Asqrt%282%29%29%2F2\"
\n" ); document.write( "\"x=-4%2F2%2Bor-2%2Asqrt%282%29%2F2\"
\n" ); document.write( "\"highlight%28x=-2%2B-sqrt%282%29%29\"
\n" ); document.write( "Either way you eventually get there.
\n" ); document.write( "Happy Calculating!!!!
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