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Answer:(i)27a³+64b³+108a²b+144ab²
(ii)125p³-27q³-225a²b+135pq²
Step-by-step explanation:(i)(3a+4b)³
Using identity--(a+b)³=a³+b³+3a²b+3ab²
=(3a)³+(4b³)+3(3a)²(4b)+3(3a)
(4b)²
=27a³+64b³+108a²b+144ab²(Ans.)
(ii)(5p-3q)³
Using identity--
(a-b)³=a³-b³-3a²b+3ab²
=(5p)³-(3q)³-3(5p)²(3q)+3(5p)(3q)²
=125p³-27q³-225a²b+135pq²(Ans.)
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