Question

What are the important parts of the equation to graph `f(x) = (x^2 - 1) / (x+1)`?

Answer 1

`xcancel=-1`

Explanation:

This equation can be simplified to `((x+1)(x-1))/(x+1) rarr (cancel(x+1)(x-1))/(cancel(x+1)) rarr x-1`

However we must remember the restriction `xcancel=-1` As doing so would make `0/0` in the original equation. However every other point would be acceptable.