Finding the derivative of 14x²/√(1-x)

[Cacophony]

Homework Statement

derivative of: (14x^2)/sqrt(1-x)

Homework Equations

The Attempt at a Solution

I am at this point at finding the derivative:

(28x(sqrt(1-x))+((7x^2)/sqrt(1-x))/(1-x)

I am confused about the next step because don't know how it's derived from the previous attempt:

Final solution: (28x-21x^2)/(1-x)^3/2

How is this derived?

 

[d2j2003]

for your equation above it should be 28x/sqrt(1-x) + 7x^2/(1-x)^3/2 then go from there..