document.write( "Question 800921: Solve the equation by completing the square: x^2+12x-85=0 \n" ); document.write( "

Algebra.Com's Answer #483371 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!
Given $\"x%5E2%2B12x-85=0\"$ \r
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\n" ); document.write( "\n" ); document.write( "Use the term, $\"%2812%2F2%29%5E2=36\"$ and add this to both sides of the equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"x%5E2%2B12x-85%2B36=36\"$
\n" ); document.write( " $\"x%5E2%2B12x%2B36-85=36\"$
\n" ); document.write( " $\"x%5E2%2B12x%2B36-85%2B85=36%2B85\"$
\n" ); document.write( " $\"%28x%2B6%29%5E2=36%2B85\"$
\n" ); document.write( " $\"%28x%2B6%29%5E2=115\"$
\n" ); document.write( " $\"x%2B6=0%2B-+sqrt%28115%29\"$ , the zero included only to make rendering work on this site.
\n" ); document.write( " $\"highlight%28x=-6%2B-+sqrt%28115%29%29\"$ \n" ); document.write( "

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