![]() One absolute rule is that the first constant, a, can never be equal to zero. In standard form, a, b, and c are all constants or numerical coefficients. The coefficient of x² is called the leading coefficient, and is represented by the variable a. When the leading coefficient is negative, the curve is upside down, with the opening facing down. When the leading coefficient is positive, the curve is oriented like the letter u, with the opening facing up. When graphed on a coordinate plane, a quadratic equation creates a parabola, which is a u-shaped curve. The standard form of a quadratic equation looks like this: Quadratic EquationsĪ quadratic equation (also referred to as a quadratic function) is a polynomial whose highest exponent is 2. ![]() In case you're new, need a refresher, or appreciate the knowledge, here are some helpful terms and descriptions to assist your calculations. Important Terms for Quadratic Equations Important Terms for Quadratic Equations
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