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

User Tomloprod
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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 
User Rudder
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Answer:

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

User Madhuparna Bhowmik
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