Question

What are the excluded values for `(k^2-4)/(k^2+5k-24)`?

Answer 1

`k= -8, and k =3`

Explanation:

The denominator is a quadratic expression which can be factorised as `(k+8)(k-3)`.

At `k= -8 and k=3` one of the the factors would be equal to zero which would make the given rational expression undefined.

Hence these two are the excluded values.