Question

Factor Completely

5x^2 + 15x - 140
•prime
•5(x - 4) (x + 7). •5(x-7)(x + 4)
•5(x - 14) (x + 2)

Answer 1

5(x + 7)(x - 4).

Explanation:

5x^2 + 15x - 140

= 5(x^2 + 3x - 28)

= 5(x + 7)(x - 4).