SOLUTION: Find all numbers for which the rational experssion is undefined. t^3-7t/t^2-81 Thanks for the help

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find all numbers for which the rational experssion is undefined. t^3-7t/t^2-81 Thanks for the help      Log On


   

Question 203910: Find all numbers for which the rational experssion is undefined.
t^3-7t/t^2-81
Thanks for the help
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
(t^3 -7t) / (t^2-81)
.
undefined if denominator is zero
.
t^2-81 = (t+9)(t-9) =0,,,t=+9,,-9