Question

Find all numbers for which the rational expression is undefined. s^3-5s)/(s^2-49)

Answer 1

A rational expression is undefined at the values where the denominator is \(0\). In this case for \(s^2-49=0\). That's \(s^2=49\) which implies that \(s=7\) or \(s=-7\).

Answer 2

so the answer is 7, -7?

Answer 3

Yep.