Question

How do you factor completely `8x^2 + 72x + 112`?

Answer 1

y = 8(x + 2)(x + 7)

Explanation:

y = 8(x^2 + 9x + 14)
Factor the trinomial in parentheses.
Find 2 numbers knowing sum (9) and product (14). They are 2 and 7.
Therefor:
y = 8(x + 2)(x + 7)