Answer:
(x - 3)(x - 9)
Explanation:
x² - 12x + 27
consider the factors of the constant term (+ 27) which sum to give the coefficient of the x- term (- 12)
the factors are - 3 and - 9 , since
- 3 × - 9 = + 27 and - 3 - 9 = - 12 , then
x² - 12x + 27 = (x - 3)(x - 9) ← in factored form