Expand: (2a - b)³
a) 2a³ - 6a²b +6ab²-b³
b) 8a³ - 12a²b +6ab²-b³
c) 2a³ + 6a²b +6ab²-b³
d) 8a³ - 6a²b - 6ab²-b³
e) 8a³ - 3a²b +6ab²-b³
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Answer:
(2a-b)³
=(2a)³-3(2a)²b+3.2a.(b)²-(b)³
=8a³-12a²b+6ab²-b³
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