SOLUTION: for which value(s) of the variable is 4x to the 2nd power over x to the 2nd power-16, undefined?

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Question 191961: for which value(s) of the variable is 4x to the 2nd power over x to the 2nd power-16, undefined?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
for x%5E2-16=0 it is undefined
:
x=4 or -4 the expression is undefined