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Hash collision

A hash collision occurs when two distinct inputs into a hash function produce identical outputs. A hash function is considered "cryptographically secure" if it is computationally infeasible to find any pair of inputs with the same output.

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Quadratic formula

... we get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> Generalizations The formula and its proof remain ...