Question

x^3 – 4x^2 – 9x + 36

Answer 1

\(=x^2\left(x-4\right)-9\left(x-4\right)=\left(x^2-9\right)\left(x-4\right)=\left(x-3\right)\left(x+3\right)\left(x-4\right)\)

Answer 2

\(x^3-4x^2-9x+36=x^2\left(x-4\right)-9\left(x-4\right)\)

\(=\left(x-4\right)\left(x^2-9\right)=\left(x-4\right)\left(x-3\right)\left(x+3\right)\)