How do you differentiate (3x+4)^2(4x-1)^3 using the power chain rule?

1 Answer
Apr 26, 2018

(3x+4)^2*12(4x-1)^2 + (4x-1)^3*(18x+24)

Explanation:

(3x+4)^2(4x-1)^3

Let

f(x)=(3x+4)^2 and g(x) = (4x-1)^3

The chain rule formula says

f(x)*g'(x) + g(x)*f'(x)

g'(x)=3(4x-1)^2 (4) and f'(x)=2(3x+4)(3)

Simplifying a little, we get

g'(x)=12(4x-1)^2 and f'(x)=6(3x+4)=18x+24

Plugging these back into the chain rule formula above

(3x+4)^2*12(4x-1)^2 + (4x-1)^3*(18x+24)

You can continue to simplify this result if you desire, but this is as good a stopping point as any in my opinion.