Answer: The actual zeros of f(x) occur when
Explanation:
The zero of a function f(x) is defined as the x value for which f(x)=0. So to find the zeros, we set f(x)=0, and then solve for x:
0=-1/4 x^2+16.
After a bit of algebra, you will find that x^2=64, so x=8,-8.