Noun
quadratic integer (plural quadratic integers)
(mathematics) A number (real or complex) which is a solution to an equation of the form
x
2
+
B
x
+
C
=
0
{\displaystyle x^{2}+Bx+C=0}
for some integers B and C. For example 42, or 2+3i, or
1
+
−
3
2
{\displaystyle 1+{\sqrt {-3}} \over 2}
.