Question

Since I never got all of the final answers to my question the first time, I'll ask again.

Simplify the expression and state the excluded values. <- (Answer both parts, please!)

(z^2-4z-77)/(z^2-13z+22)

Answer 1

factor both the numerator and denominator to get:

(z-11)(z+4)/(z-11)(z-2)

then you can cancel out the quantity (z-11) and therefore, the leftover quantities are:
(z+4) and (z-2)

Answer 2

So is the answer (z+4)/(z-2)? Also, what are the excluded values?

Answer 3

(z+7)/(z-2)

Answer 4

(z) can never be 2

or else it will be undefined

Answer 5

@ jerwyn gayo: So they made a mistake? The answer is (z+7)/(z-2)?

Answer 6

yeah. but' consider it as a simple mistake. .

Answer 7

OK, that's fine. Thank you.