How many x intercepts appear on the graph of this polynomial function?

f(x)=x^4-5x^2

1 x intercept

2 x intercepts

3 x intercepts

4 x intercepts

How many x intercepts appear on the graph of this polynomial function?

f(x)=x^4-5x^2

1 x intercept

2 x intercepts

3 x intercepts

4 x intercepts