Solve by factoring. x² - 121 = 0

Question

0
-11
11
11, -11

Solve by factoring. m² + 8m + 7 = 0

8,7
-7, 1
-7, -1
7, 1

Answer 1

The first one is a case of "difference of squares". You absolutely MUST know
how to do that. Please learn it

2nd: what two factor of 7 add up to 8?

Answer 2

I don't remember how to do either

Answer 3

I think the purpose of learning and studying is that you do remember the course content.

Answer 4

I'm done with school, I'm just trying to review since I totally forgot factoring