anonymous 5 years ago find all numbers for which the rational expression is undefined. s^3-9s/s^2-16

1. anonymous

should just be anything where s^2=0

2. anonymous

with btw is s=0

3. anonymous

which*

4. anonymous

no its undefined when you are dividing something by zero $\frac{a}{0}$

5. anonymous

i think the denominator is s^2 - 16, so the answer is +4, -4

6. anonymous

so you want the bottom zero right (s^2 -16) so when does s^2-16 =0 ?