Answer:
0, 1, or 2 real solutions
Explanation:
Including complex and repeated solutions, a polynomial with real coefficients, and of degree n, always has n solutions.
If you're only concerned about real solutions, a 2nd degree equation in one variable may have 0, 1, or 2 real solutions. Here are some examples.
- 0 solutions: x^2 +1 = 0
- 1 solution: x^2 = 0
- 2 solutions: x^2 -1 = 0