Question 135912
(x+(x+1))^2 does NOT equal 2x^2+1


(2x+1)(2x+1) __ FOILing __ 4x^2+4x+1=529


subtracting 1 and dividing by 4 __ x^2+x=132


subtracting 132 __ x^2+x-132=0 __ factoring __ (x+12)(x-11)=0


so x=-12 and x=11