Answer:
(x - 7)(x + 4)
Explanation:
Given
x² - 3x - 28
Consider the factors of the constant term ( - 28) which sum to give the coefficient of the x- term ( - 3)
The factors are - 7 and + 4, since
- 7 × 4 = - 28 and - 7 + 4 = - 3, hence
x² - 3x - 28 = (x - 7)(x + 4) ← in factored form