Question

Which are factors of x² - 4x - 5? Select two options.

(x - 5)
0 (x-4)
0 (x-2)
0 (x + 1)
0 (x + 5)

Answer 1

(x - 5) and (x + 1)

Explanation:

x² - 4x - 5

consider the factors of the constant term (- 5) which sum to give the coefficient of the x- term (- 4)

the factors are - 5 and + 1 , since

- 5 × + 1 = - 5 and - 5 + 1 = - 4 , then

x² - 4x - 5 = (x - 5)(x + 1)

Answer 2

(x-5) & (x+1)

Explanation: