State how many imaginary and real zeros the function has.
f(x) = x4 - 15x2 - 16

2 real roots

2 imaginary roots

Step-by-step explanation:

So we have the function:

And we want to find its zeros.

First, let u equal x². So:

Factor:

Zero Product Property:

Add 16; Subtract 1. Replace u:

Take the square root:

So, our solutions are 2 real roots and 2 imaginary roots.

you need to show us the graph.

step-by-step explanation: