Question

Look at the rational expression below. x^2-4/2-x Which value of x makes the expression undefined?

Answer 1

the answer would 2, since you cannot divide anything by 0 as it would be undefined. 2 is the only number that gives you this option 

Answer 2

given rational function is undefined for x = 2

Explanation:

The given rational function is

`(x^2-4)/(2-x)`

The rational function is undefined if the denominator is zero.

Hence, the given rational function is undefined if

`2-x=0`

Solve the equation for x

`x=2`

Therefore, the given rational function is undefined for x = 2