The graph of f (x) = x^5 + 2x^4 - x - 2 is given. How many complex zeros does the function have?

According to the graph of f (x), the function has three real solutions to x = - 2, x = - 1 and x=1.

Then, given that the function is a 5 degree polynomial, we can conclude that the function has 2 complex zeros.