Question

find all numbers for which the rational expression is undefined. r^3-6r/r^2-64

Answer 1

the denominator can't be 0, so +/-8

Answer 2

how do you come to this conclusion? I am trying to understand the answer to this...not looking for just an answer...i have been working on it for 45 minutes..ughhh

Answer 3

the denominator cannot be zero

Answer 4

Therefore, r^2-64 can not =0

Answer 5

64-64=0, positive or negative 8 squared is 64

Answer 6

If r were 8 or -8, you'd get a divide by zero error

Answer 7

ok so i am still al ittle confused as to how i would write the equation that =0

Answer 8

Use the \[\neq\]

Answer 9

You don't have to rewrite the equation. You just can't plug in 8 or -8 for r

Answer 10

thank you so much

Answer 11

NP