Answer:
0 real roots or 2 complex roots
Explanation:
Discriminant: b² - 4ac
If d > 0, then there are 2 real zeros
If d = 0, then there is 1 real zero
If d < 0, then there are 0 real zeros and 2 complex/imaginary zeros
Simply substitute a = 1, b = -5, and c = 40
Our d should equal -135, showing us we have 0 real roots and 2 complex ones.