Answer:
(x - 4)(x - 7)
Explanation:
x² - 11x + 28
consider the factors of the constant term (+ 28) which sum to give the coefficient of the x- term (- 11)
the factors are - 4 and - 7 , since
- 4 × - 7 = + 28 and - 4 - 7 = - 11
then
x² - 11x + 28 = (x - 4)(x - 7) ← factored form