Quadratic equation

related topics
{math, number, function}
{@card@, make, design}
{style, bgcolor, rowspan}
{language, word, form}
{mi², represent, 1st}

In mathematics, a quadratic equation is a polynomial equation of the second degree. The general form is

where x represents a variable, and a, b, and c, constants, with a ≠ 0. (If a = 0, the equation becomes a linear equation.)

The constants a, b, and c, are called respectively, the quadratic coefficient, the linear coefficient and the constant term or free term. The term "quadratic" comes from quadratus, which is the Latin word for "square". Quadratic equations can be solved by factoring, completing the square, graphing, Newton's method, and using the quadratic formula (given below).

One common use of quadratic equations is computing trajectories in projectile motion. Another common use is in electronic amplifier design for control of step response and stability.


Full article ▸

related documents
Exponentiation by squaring
General linear group
Imaginary unit
Finite set
Relational database
P = NP problem
Lie algebra
Busy beaver
Control flow
Stochastic process
Riemannian manifold
Semidirect product
Communication complexity
Category theory
Exponential function
Multiplication algorithm
Dylan (programming language)
Set (mathematics)
Support vector machine
Vacuous truth
Taylor series
Metric space
Mathematical constant
Sorting algorithm