Question

How do you simplify `(z^2-49) /(z+7)` and what are the restrictions?

Answer 1

`z-7`

Explanation:

1) Factorize quadratic on numerator

`((z+7)(z-7))/(z+7)`

2) Divide the top and bottom by the common factor (`z+7`)

`(z-7)/1`

3) Done

`z-7`