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Mathematics
Mathematics
Problem
If
a
=
2
+
1
2
−
1
a = \frac{\sqrt{2}+1}{\sqrt{2}-1}
a
=
2
−
1
2
+
1
and
b
=
2
−
1
2
+
1
b = \frac{\sqrt{2}-1}{\sqrt{2}+1}
b
=
2
+
1
2
−
1
, then find the value of
a
2
+
b
2
−
4
a
b
a^2 + b^2 - 4ab
a
2
+
b
2
−
4
ab
.
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