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Only that the equation that you are trying to solve is a quadratic, that is to say, the powers of the variable are 2,1 and 0 (or any constant increment of these three numbers).

Non-negativity of the discriminant is NOT a condition because you can still use the quadratic formula and get roots that are in the complex domain.

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13y ago
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Q: What are the conditons that are met before you can use the quadratic formula?
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