Tuesday, December 2, 2008
December 2, 2008
Let
a,
b
, and
c
be real numbers such that
a
– 7
b
+ 8
c
= 4 and 8
a
+ 4
b
–
c
= 7. Then
a
^{2}
–
b
^{2}
+
c
^{2}
is?
Interactive version of problem and solution.
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