Math Arguments
180 Days of Ideas for Discussion in Math Class. (as of 9July2014, we're in overtime!)
Wednesday, June 18, 2014
158: Equations with Symmetry
Find four distinct integers
a
,
b
,
c,
and
d
such that
ab
=
c
+
d
and
cd
=
a
+
b
.
From
NCTM
.
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