Question

(x-4)(x+5)

(x+9)(x-7)(x+5)

2x(x+9) + 5x(x+3)

Answer 1

X^2 + x - 20

(X^2 + 2x - 63)( x + 5)
X^3 + 5x^2 + 2x^2 + 10x - 63x - 315
X^3 + 7x^2 - 53x - 315

2x^2 + 18x + 5x^2 + 15x
7x^2 + 33x