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Related to quadratic: quadratic equation, quadratic formula


mathematical expression of the second degree in one or more unknowns (see polynomialpolynomial,
mathematical expression which is a finite sum, each term being a constant times a product of one or more variables raised to powers. With only one variable the general form of a polynomial is a0xn+a1x
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). The general quadratic in one unknown has the form ax2+bx+c, where a, b, and c are constants and x is the variable. A quadratic equation ax2+bx+c=0 always has two rootsroot,
in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r
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, not necessarily distinct; these may be real or complex (see numbernumber,
entity describing the magnitude or position of a mathematical object or extensions of these concepts. The Natural Numbers

Cardinal numbers describe the size of a collection of objects; two such collections have the same (cardinal) number of objects if their
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). The quadratic formula

gives the roots of any quadratic equation in terms of its coefficients a, b, and c. The expression b2−4ac is called the discriminant and vanishes when the two roots coincide. If a, b, and c are real and the discriminant is not less than zero, the roots are real.


[kwä ′drad·ik]
Any second-degree expression.


1. an equation containing one or more terms in which the variable is raised to the power of two, but no terms in which it is raised to a higher power
2. of or relating to the second power
References in periodicals archive ?
For the dependent variable that refers to immigration control for ethnically dissimilar immigrants, the quadratic terms for the demographic predictors also lose statistical significance.
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We deal with quadratic algebras generated in degree one, that is, algebras given by homogeneous relations of degree 2:
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Quadratic Variation of Brownian Motion on Time Scales
863], in the discrete calculus of variations setting one can study the definiteness of the corresponding quadratic form in terms of the Jacobi equation ([J.
The method of fitting a quadratic polynomial can be extended to polynomials of higher degree.