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Foundations
medium
0:00.0
Evaluate
2
a
2
−
(
a
−
1
)
2
2a^2-(a-1)^2
2
a
2
−
(
a
−
1
)
2
when
a
=
3
a=3
a
=
3
.
A
18
18
18
B
10
10
10
C
4
4
4
D
14
14
14
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