Answer:
(x - 5)(x + 1)
Step-by-step explanation:
Given
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, thus
x² - 4x - 5 = (x - 5)(x + 1) ← in factored form
