Posted by Lauren on Saturday, April 9, 2011 at 3:11pm.
x^2+16x-144=0
x^2+16x=144
x^2+16x+8^2=144+8^2
x^2+16x+8^2=(x+8)^2
(x+8)^2=144+64
(x+8)^2=208
(x+8)*(x+8)=208
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