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|  | | Quadratic equation
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|  | | |  Quadratic equations describe the curve of a parabola. They may be solved exactly for x or y by using equations devived by factorizing the equation for the case of y=0.
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| | |  For a given value of y, there may be up to 2 real values of x, since the squares of negative and positive numbers are both positive. | | ||||||
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© Andy & Steve Shipway 2008