# How do you factor #2x^2-2x-84#?

##### 2 Answers

Jun 25, 2016

#### Explanation:

when factorising you find a common multiple of all the digits. In this case we have

Double checking our work

Therefore =

Jun 25, 2016

2(x + 6)(x - 7)

#### Explanation:

Factor the trinomial in parentheses.

Find 2 numbers knowing their sum (b = -1) and their product (c = -42)

They are: 6 and -7.

Sum: 6 - 7 = -1

Product: 6(-7) = -42

y = 2(x + 6)(x - 7)