Of or relating to or resembling a → square.
Quadratic, adj. of quadrate, from L. quadratus p.p. of quadrare "to make square."
Câruši pertaining to câruš "square," from Av. caθruša- "four sides (of a four-sided figure)," from caθru- "four," Mod.Pers. cahâr, câr "four," cognate with L. quattuor, → four.
Fr.: équation quadratique
An equation with the general form of ax2 + bx +c = 0, in which the highest power of the unknown is the second power (square).
Fr.: formule quadratique
A formula relating the unknown part of a → quadratic equation (the roots of the equation, x) to the known parts (a, b, and c): x = (-b± (b2 - 4ac)½) / 2a.