Dik, F(x)=(2x-1)^2 (x+3) Dit f'(x)=?

U=(2x-1)^2
v=(x+3)
u'v+uv'
4(2x-1)(x+3)+(2x-1)^2
4(2x^2+5x-3)+(4x^2-4x+1)
12x^2 +16x-11

U=(2x-1)^2
v=(x+3)
u'v+uv' 
4[2x-1]x+3+2x-1^2
42x^2+[5x]-3+4x^2-4x+1
12x^2 +16x-[11]