Question

(x+2)(x²+25)+10x²+20x factorise

Answer 1

Please refer to the above pics for your answer

Answer 2

$= (x + 2)(x^{2} + 25) + 10x^{2} + 20x \\ = (x + 2)(x^{2} + 25) + 10x(x + 2) \\ = (x + 2)(x^{2} + 25 + 10x) \\ = (x + 2)(x^{2} + 5^{2} + 2 \times x \times 5) \\ = (x + 2)(x + 5)^{2} \\ = (x + 2)(x + 5)(x + 5)$
Hope it helps