# How do you factor #r^2+3r-40#?

##### 1 Answer

Jun 13, 2018

#### Explanation:

What factors of -40 add up to 3?

-2, 20 no

-4, 10 no

-5,8 yes

Jun 13, 2018

What factors of -40 add up to 3?

-2, 20 no

-4, 10 no

-5,8 yes

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