Question

(x+5)(x-2)(x+4)
$(x + 5)(x - 2)(x + 4)$

Answer 1

Will you please mention what is to be done in this question like for example to solve it by identities or factorise it..

Answer 2

(x+5)(x-2)=x^2-2x+5x-10=x^2+5x-10
Now,
x^2+5x-10(x+4)
=x^3+4x^2+5x^2+20x-10x--40
=x^3+9x^2+10x-40