# How do you factor #9fg-45f-7g+35#?

##### 1 Answer

May 4, 2017

#### Explanation:

Note that both 7 and 5 are prime numbers and 5 is one of the factors of 35 and 45. Also 5 is not a factor of 9. So I choose to test the start point of:

But

As the 35 is positive both signs are the same.

We need

We need