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Foundations
medium
0:00.0
Evaluate
x
2
−
1
x^2 - 1
x
2
−
1
for
x
=
\rt
10
x = \rt{10}
x
=
\rt
10
.
A
9
B
99
C
\rt
9
\rt{9}
\rt
9
D
11
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