document.write( "Question 116557: Solve the equation by completing the square\r
\n" ); document.write( "\n" ); document.write( "x^2+12x= -13 \n" ); document.write( "

Algebra.Com's Answer #84753 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Completing the square means Take half the coefficient of the x term,
\n" ); document.write( "square it, and add it to both sides
\n" ); document.write( " $\"x%5E2+%2B+12x+=+-13\"$
\n" ); document.write( " $\"x%5E2+%2B+12x+%2B+%2812%2F2%29%5E2+=+-13+%2B+%2812%2F2%29%5E2\"$
\n" ); document.write( " $\"x%5E2+%2B+12x+%2B+36+=+-13+%2B+36\"$
\n" ); document.write( " $\"%28x+%2B+6%29%5E2+=+23\"$
\n" ); document.write( " $\"x+%2B+6+=+0+%2B-sqrt%2823%29\"$
\n" ); document.write( " $\"x+=+-6+%2B-sqrt%2823%29\"$ \n" ); document.write( "

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