Question

Which represents all the values of x that make the rational expression 2x-4 over x-5 undefined?

Answer 1

X=5 because the denominator can never equal zero or it will be undefined. and 5-5=0

Answer 2

Answer:

x = 5

Step-by-step explanation:

The given rational expression is

$\dfrac{2x-4}{x-5}$

We need to find all the values of x that make the rational expression undefined.

The given expression is undefined if the value of denominator is equal to 0.

Equate the denominator equal to 0.

$x-5=0$

Add 5 on both sides.

$x-5+5=0+5$

$x=5$

It means the given expression is undefined for x=5. Therefore, the correct option is 2.