document.write( "Question 423757: Solve 2x^2-16x+20=132 by completing the square. \n" ); document.write( "

Algebra.Com's Answer #295466 by mananth(16946) $\"\"$ $\"About$

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2x^2-16x+20=132\r
\n" ); document.write( "\n" ); document.write( "2x^2-16x=112\r
\n" ); document.write( "\n" ); document.write( "/2
\n" ); document.write( "x^2-8x=56
\n" ); document.write( "x^2-8x+16=56+16
\n" ); document.write( "(x-4)^2= 72\r
\n" ); document.write( "\n" ); document.write( "take the square root on both sides
\n" ); document.write( "(x-4)= +/-sqrt72\r
\n" ); document.write( "\n" ); document.write( "x= 4+sqrt72 =12.48
\n" ); document.write( "OR
\n" ); document.write( "x=4-sqrt72 = -4.48 \n" ); document.write( "

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