Question

How do you factor the expression `-6 a^2 - ab + 7 b^2`?

Answer 1

`(b-a)(6a+7b)`

Explanation:

`-6 a^2 -ab +7b^2 = -6 a^2 +6ab -7ab+7b^2`
`= -6a(a-b)-7b(a-b) = (b-a)(6a+7b)`