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

Question

2097 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-04-18T17:40:15

x= -9 and x=5

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.

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