Question

Find all the numbers for which the rational expression is unidentified.

t^3-9t/t^2-36

Answer 1

\[t \neq 6\]

Answer 2

\[t \neq -6\]

Answer 3

t can't equal either of those

Answer 4

your job is to set the denominator = 0 and solve. ignore the numerator. you get
\[x^2-36=0\]
\[x^2=36\]
\[x=\pm6\] so you get exactly what hero said. undefined at 6 and -6

Answer 5

The numbers for which the rational expression is undefined are +6,-6 or did I completely misunderstand?