Question

How do you simplify `(5x-15)/(x-3)`?

Answer 1

The value of this expression is `5`. See explanation.

Explanation:

First we have to find the domain of this rational expression:

`x-3 !=0 => x !=3`

The domain is `x in RR-{3}`

The value of this expression is:

`(5x-15)/(x-3)=(5(x-3))/(x-3)=5`

Answer: The value of this expressionm is 5 for all real numbers `x` different from 3