#### Answer

4 zeros

#### Work Step by Step

The number of zeros of the function is determined by the degree of the polynomial. The degree is the high value exponent of x. For example:
y = x is a first degree since x has an exponent of 1.
y = $x^{2}$ is a second degree polynomial since x has an exponent of 2.
The number of zeros is the degree of the polynomial.
In this example, the highest exponent (degree of the polynomial) on the x is 4, so there are 4 zeros.