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

Question

asked Jun 4, 2020 29.5k views

1 Answer

Bitmap · Answer 1 · 2020-06-09T17:29:45+0000

For this case we have the following expression:

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

By definition, we have the expression undefined when the denominator is 0.

So:

x-5 = 0

Adding 5 to both sides of the equation:

$x-5 + 5 = 5\\x = 5$

Thus, the expression is undefined when
x = 5.

Answer:

Option B