The function f is defined by f(x)=(2x^2)-5. What are all possible values of f(x) where -2<x<2?

I don’t understand how to do this.

Easiest way is probably to graph it.

The vertical dashed lines are *x* = –2 and *x* = 2. Between those lines, you care about all the values of *f*(*x*), which basically means you care about all the *y*-values. That’s everything from *y* = –5 to *y* = 3, inclusive.