Question

evaluate the function at the given values of x, if possible

f(x)=6x^2-1/x^2
(a) x-=4 (b)x=-2

Answer 1

is this
\[f(x)=\frac{6x^2-1}{x^2}\]? if so then
\[f(-2)=\frac{6\times (-2)^2-1}{(-2)^2}=\frac{24-1}{4}\]

Answer 2

is a undefined