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> Perfect square
The term
perfect square
is used in
mathematics
in two meanings:
a positive
integer
which is the square of some other integer, i.e. can be written in the form
n
2
for some integer
n
.
Examples: 1, 4, 9, 16, 25, 36, 49, ... See
square number
.
an algebraic expression that can be factored as the square of some other expression, e.g.
a
2
± 2
ab
+
b
2
= (
a
±
b
)
2
. (see
Square (algebra)
).
This is not the same as a
magic square
.
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