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state the restrictions on x (hint: x is not equal to what?)
a. 0,2,-4, and 4
b. 2,-4, and 4
c. -4, and 4
d. 0,-4, and 4
Whatever values of 'x' that make the DENOMINATOR = 0 are not allowed.
it is OK if the NUMERATOR = 0
so any 'x' that makes x^2-16 = 0 are not allowed
x^2 = 16
x= +-4 NOT allowed, answer is 'c'