# How do you factor by grouping #12x^2-7x-5#?

##### 2 Answers

Jun 6, 2015

The trick is to find how to split the middle

The split comes from a pair of factors of

Jun 6, 2015

When a + b + c = 0, you are advised to use the Shortcut.

One factor is (x - 1) and the other is (-c/a = 5/12).

y = (x - 1)( 12x + 5)