Considerthe function f(x)= x-2/x^2-81 for what value of x if any will this function a) equal 0
B)be undefined. Explain.
I have a hunch you mean
f(x)= (x-2)/(x^2-81)
which is
(x-2)/ [ (x-9)(x+9) ]
it is zero if the numerator is zero
so when x = 2
it is undefined when the denominator is zero
x = 9 or x = -9