Question

What are the excluded values?

0 and 15

3 and -5

-3 and 5

Answer 1

x=5 x = -3

Explanation:

-7 / ( x^2 -2x -15)

Factor the denominator

-7

----

(x-5) ( x+3)

The excluded values are when the denominator is equal to zero

(x-5) (x+3) =0

x-5 =0 x+3=0

x=5 x = -3