document.write( "Question 100955: Solve the equation by completing the square\r
\n" ); document.write( "\n" ); document.write( "x^2 + 16x + 43 = 0 \n" ); document.write( "

Algebra.Com's Answer #73458 by tutorcecilia(2152) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^2 + 16x = -43
\n" ); document.write( "x^2+16x+(16/2)^2=-43+(16/2)^2
\n" ); document.write( "x^2+16x+(16/2)^2=-43+64
\n" ); document.write( "x^2+16x+(8)^2=21
\n" ); document.write( "(x+8)(x+8)=21
\n" ); document.write( "(x+8)^2=21
\n" ); document.write( " $\"%28sqrt%28x%2B8%29%5E2%29%29\"$ = $\"%28sqrt%2821%29%29\"$
\n" ); document.write( "x+8= $\"%28sqrt%2821%29%29\"$
\n" ); document.write( "x= -8 -+ $\"%28sqrt%2821%29%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );