Factor completely.
5x2 + 10x - 40
5(x - 4)(x + 2)
5(x - 2)(x + 4)
5(x - 4)(x - 2)
5x2 + 10x - 40
5(x - 4)(x + 2)
5(x - 2)(x + 4)
5(x - 4)(x - 2)