How many solutions does x^2 - 5x + 3 = 0 have?
Before solving a quadratic, the discriminant can tell you how many real answers it will have. One number, three cases.
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2 lessons for “The discriminant”
What is x when x^2 - 2x - 4 = 0?
Not every quadratic factors over the integers. The quadratic formula works for all of them, and it only asks you for three careful numbers.
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