Factorize the following expression : \((x + 2)(x^2 + 25) – 10x^2 – 20x\)

\[ (x + 2)(x^2 + 25) – 10x^2 – 20x \] \[ = (x + 2)(x^2 + 25) – 10x(x + 2) \] \[ = (x + 2)\left[(x^2 + 25) – 10x\right] \] \[ = (x + 2)(x^2 – 10x + 25) \] \[ = (x + 2)(x – 5)^2 \]