Question 398024
The expression {{{(t^3 - 4t)/(t^2 - 36)}}} is undefined when it equals z/0 for nonzero z (if z is zero then the expression is said to be indeterminate).


Therefore we set {{{t^2 - 36 = 0}}} and find the values of t. We see that 6 and -6 are the two values that make the expression undefined.