Question

Factorise x squared +3x - 40

Answer 1

(x-5)(x+8)

Explanation:

Factors of -40:

-1, 40

-2, 20

-4, 10

-5, 8

-5 + 8 =3

x^2+3x-40

x^2 -5x +8x -40

=(x-5)(x+8)

Answer 2

Answer: (x-5)(x+8)

Step by step: The numbers need to have a product of -40 and add up to 3