# How do you differentiate f(x)=4(x^2 + x - 1)^10  using the chain rule?

$f ' \left(x\right) = 40 {\left({x}^{2} + x - 1\right)}^{9} \left(2 x + 1\right)$
We used that $\left({x}^{n}\right) ' = n {x}^{n - 1}$ and that $\left({x}^{2} + x - 1\right) ' = 2 x + 1$