(x+h)^2 is (x+h) (x+h) OR (x+h) (x-h)?
Remember that something squared is just that thing times itself....so we have
(x + h)^2 = (x + h) (x + h) = x^2 + 2xh + h^2
It not either one.
It is this. x2 +2xh +h2
NEITHER!!. Both are wrong!