What is the expand form of cubic identity = (2a+b)³
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Answer:
Step-by-step explanation:
Using identity,
(a – b)³ = a³–b³ – 3ab(a – b)
(2a + b)³ = (2a)³+ (3b)³ + (3×2a×b)(2a + b)
=8a³+ b³–18ab (2a + b)
= 8a³+ b³–36a²b + 18ab²
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