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4 Topic Pages Found in Mathematics & Statistics and starting with the letter Q
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quadratic equation

In mathematics, a polynomial equation of second degree (that is, an equation containing as its highest power the square of a variable, such as x 2 ).

Open Quadrilaterals

A plane figure formed by four intersecting lines. A simple quadrilateral is a polygon with four sides. A complete quadrilateral ( see diagram) is the

Open quantum electrodynamics
quantum electrodynamics

Quantum theory of the interactions of charged particles with the electromagnetic field . It describes the interactions of light with matter as well as

Open Quartile (Statistics)
Quartile (Statistics)

In statistics, any one of the three values that divide data into four equal parts. They comprise the lower quartile , below which lies the lowest 25%