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This one number can tell you whether the solutions to a quadratic equation are real or non-real, and whether they are distinct or repeated.

If \(a = 2, b = 4, \text{ and } c = 1,\) what is the value of \(b^2 - 4ac?\)

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If \(a = -2, b = 3, \text{ and } c = -1,\) what is the value of \(b^2 - 4ac?\)

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