Question

How do you factor `x^2-x-72`?

Answer 1

`(x-9)(x+8)`

Explanation:

`x^2-x-72 = x^2-9x+8x -72`

`= x(x-9)+8(x -9)= (x-9)(x+8)`

`=(x-9)(x+8)` [Ans]