1.NounA polynomial equation of the second degree; an equation that can be rearranged in standard form as
a
x
2
+
b
x
+
c
=
0
{\displaystyle ax^{2}+bx+c=0}
, where
x
{\displaystyle x}
is an unknown value,
a
{\displaystyle a}
,
b
{\displaystyle b}
, and
c
{\displaystyle c}
are known numbers, and where
a
{\displaystyle a}
does not equal zero.