In general, solving a quadratic equation means to find the x values that, when
substituted back into the equation, cause it to equal zero.
The graph of the parabola will cross the X axis at these x values. Next you find the coordinates of the vertex
of the parabola. Finally you trace the curve defined by these three points.
The quadratic equation is the equation of a parabola. Solving
a quadratic equation is covered in Quadratic Equation.
Plotting a parabola is covered in Parabola.
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