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
What factors of -40 add up to 3?
-2, 20 no
-4, 10 no
-5,8 yes