Square of (x + 2) + (2x + 1)) (2x-1) - 4x (x + 1) Simplification before evaluation

Square of (x + 2) + (2x + 1)) (2x-1) - 4x (x + 1) Simplification before evaluation


The original formula = (x + 2) &# 178; + (2x + 1) (2x-1) - 4x (x + 1)
=(x+2)²+(4x²-1)-4x²-4x
=(x+2)²-4x-1
=x²+3