# How do you factor completely #2x^2+6x-80#?

##### 2 Answers

y = 2(x - 5)( x + 8)

#### Explanation:

Factor the trinomial in parentheses.

Find 2 numbers knowing sum (b = 3) and product (c = -40).

They are (-5, 8).

y = 2(x - 5)(x + 8)

#### Explanation:

Given

First observe that all the terms have a constant factor of

so we can write:

Next lets think about factors of

In

and the middle term

Therefore our complete factors are: