Question

How do you factor `a^2 + 7a - 30`?

Answer 1

`(a+10)(a-3)`

Explanation:

You have to find two factors (`x` and `y`), where

`x+y= +7" "` and where `" "x*y = 30`

`a^2 + 10a - 3a + 30`

Then take the common factor out.

`a(a + 10) - 3(a+10)`

`(a-3)(a+10)`