jika f(×)=(2x-1)^2(x+2),maka turunanya f(x)=...

y = u.v => y' = u'v + uv'
u = (2x-1)² ; v = x+2
f'(x) = 2(2x-1).2.(x+2) + (2x-1)².1
       = 4(2x²+4x-x-2) + (4x²-4x+1)
       = 8x² + 12x - 8 + 4x² - 4x + 1
       = 12x² + 8x - 7

f(x) = (2x - 1)² (x + 2)

f '(x)
= (2x - 1)² . 1 + 2 . 2(2x - 1) . (x + 2)
= (2x - 1)² + 4(2x - 1)(x + 2)
= 4x² - 4x + 1 + 4(2x² + 4x - x - 2)
= 4x² - 4x + 1 + 4(2x² + 3x - 2)
= 4x² - 4x + 1 + 8x² + 12x - 8
= 12x² + 8x - 7