If f(x)=2x+1f(x) = 2x + 1f(x)=2x+1 and g(x)=x2g(x) = x^2g(x)=x2, find (f+g)(x)(f + g)(x)(f+g)(x).
x2+2x+1x^2 + 2x + 1x2+2x+1
2x3+x22x^3 + x^22x3+x2
x2−2x−1x^2 - 2x - 1x2−2x−1
2x2+12x^2 + 12x2+1