# How do you simplify and find the excluded value #(x-9)/(x^2+4x-45)#?

##### 1 Answer

Apr 18, 2016

x= -9 and x=5

#### Explanation:

The denominator can be factored as (x+9)(x-5)

If x=-9 0r 5, the expression becomes undefined. Hence from all real values, which x can have, -9 and 5 are to be excluded.

the expression cannot be simplified any further.