If f(x)=x2+2f(x) = x^2 + 2f(x)=x2+2 and g(x)=x−3g(x) = x - 3g(x)=x−3, what is (f+g)(x)(f + g)(x)(f+g)(x)?
x2+x−1x^2 + x - 1x2+x−1
x2−x−1x^2 - x - 1x2−x−1
x2+x+2x^2 + x + 2x2+x+2
x2−3x^2 - 3x2−3