Answer:
(x + 7) (x + 2) (x - 2)
Step-by-step explanation:
p(x) = x³ + 7x² - 4x - 28
= x² (x + 7) - 4 (x +7)
= (x + 7) (x² - 4)
= (x + 7) (x + 2) (x - 2)
