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Foundations
easy
0:00.0
Simplify:
(
a
+
b
)
−
(
a
−
b
)
(a+b)-(a-b)
(
a
+
b
)
−
(
a
−
b
)
.
A
2
b
2b
2
b
B
2
a
2a
2
a
C
0
0
0
D
2
a
−
2
b
2a-2b
2
a
−
2
b
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