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Frequently asked questions
What is the discriminant?
The value b squared minus 4ac, which determines the nature of the roots: positive means two distinct real roots, zero means one repeated real root, and negative means two complex roots.
What if I enter a = 0?
The equation would no longer be quadratic, so the tool asks for a non-zero value of "a".
What do complex roots mean?
They indicate the equation has no real-number solutions.