Question

simplifique: sendo a=(x-1)²+(x-1)(x+1) e b=-2x(x+1), calcule a+b

Answer 1

a = x²-2x+1+x²-1 ---> a = 2x²-2x
b = -2x²-2x

a+b = 2x²-2x+(-2x²-2x)
a+b = 2x²-2x-2x²-2x
a+b = -4x