Definitions for quadratic equation
Random House Webster's College Dictionary
an equation containing a single variable of degree 2. Its general form is ax2+bx+c= 0, where x is the variable and a, b, and c are constants (a≠ 0).
Origin of quadratic equation:
quadratic equation, quadratic(noun)
an equation in which the highest power of an unknown quantity is a square
a polynomial equation of the second degree.
In mathematics, a quadratic equation is a univariate polynomial equation of the second degree. A general quadratic equation can be written in the form where x represents a variable or an unknown, and a, b, and c are constants with a ≠ 0. ² The constants a, b, and c are called respectively, the quadratic coefficient, the linear coefficient and the constant term or free term. Quadratic equations can be solved by factoring, completing the square, using the quadratic formula, and graphing.²
The Nuttall Encyclopedia
an equation involving the square of the unknown quantity.
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