According to the fundamental theorem of algebra, how many zeros does the polynomial below have?

The given polynomial has 4 roots.

( may not be all distinct)

Fundamental Theorem of Algebra --

It states that every non-constant polynomial of degree n has exactly n roots counting  multiplicity.

i.e. the roots may repeat.

i.e. the  number of roots of a non-constant polynomial of degree n has atmost n distinct roots.

We are given a polynomial as:

Clearly the polynomial is of degree 4.

This means that the roots of this polynomial will be: 4

( not all  roots may be distinct)