Which of the following expressions is undefined when x = C2?

Which of the following expressions is undefined when x = C2?
A .

B .

C .

D .

E .

View Answer

Answer: E

Explanation:

An expression is undefined when a denominator of the expression is equal to zero. When x = C2, x 2 + 6 x + 8 = (C2) 2 + 6 × (C2) + 8 = 4 C 12 + 8 = 0.