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Exponents & Radicals
hard
0:00.0
If
x
=
1
+
2
x = 1 + \sqrt{2}
x
=
1
+
2
, find the value of
x
2
−
2
x
−
1
x^2 - 2x - 1
x
2
−
2
x
−
1
.
A
0
B
1
C
−
1
-1
−
1
D
2
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