2 x 2 1 0 x 1 2 0. A quadratic equation has two solutions called roots. The graph of a quadratic function is a parabola.
So it will have something like x2.
2x2 -10x 12 0 2x2 10x12 0 then you know it is a quadratic equation and in this case a 2. American Heritage Dictionary of the English Language Fifth Edition. Definition of quadratic equation. A Quadratic Equation is usually written ax2 bx c 0.