Question

How do you solve `n^2 + 7n + 15 = 5` by factoring?

Answer 1

`n=-2 and n=-5`

Explanation:

Given: `n^2+7n+15=5`

Subtract 5 from both sides

`n^2+7n+10=0`

Note that `2xx5=10 and 2+5=7` giving:

`(n+2)(n+5)=0`

Thus: `n=-2 and n=-5`