Question

Factor the trinomial: 2x^2+4x-70

The final answer is 2(x-5)(x+7), I just don’t know how to get to that answer. Please help I have a test soon.

Answer 1

Hi,

Explanation:

Without using quadratic formula:

`2x^2+4x-70\\=2(x^2+2x-35)\\=2(x^2+2x+1-36)\\=2((x+1)^2-6^2)\\=2(x+1-6)(x+1+6)\\\\=2(x-5)(x+7)\\`