Question: how to find the number of roots of a quadratic equation?
Answer: The number of real roots of a quadratic equation depends on the Discriminant of that equation. Now, if ax^2 + bx + c = 0 is the equation, then it's discriminant will be (b^2 - 4ac)^1/2. So, if b^2 - 4ac > 0, then the equation will have two distinct real roots.