can you please tell what are the answer for these
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(a) (2a+b)³
Sol.- (2a + b)³ = (2a)³ + (b)³ + 3(2a)(b)(2a+b)
= 8a³ + b³ + 3(2a)(b)(2a) + 3(2a)(b)(b)
= 8a³ + b³ + 12a²b + 6ab²
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