Question

Which are factors of x2 – 4x – 5? Check all that apply.

Answer 1

The factors are -1 and 5
(x+1)(x-5)

Answer 2

Given x² - 4x - 5 = 0

To find : factor of x² - 4x - 5

Proof :

Given x² - 4x - 5 = 0

=> x2 + x - 5x - 5 = 0

=> (x - 5 ) x (x + 1) = 0

=> (x - 5 )(x + 1) = 0

∴  the factors of x² - 4x - 5 is (x - 5) (x + 1)