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Quadratic equation

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Quadratic equation diagram
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.
a =
b =
c =
Find y when x=
Find x when y=

For given y, x=
For given y, x=
For given x, y=
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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.