slow the questions pllzzz
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15. Formula:- (a+b)³=a³+b³+3ab(a+b) (or) a³+b³+3a²b+3ab².
(2a+3b)³.
(a+b)³=a³+b³+3ab(a+b) (or) a³+b³+3a²b+3ab².
(2a+3b)³=(2a)³+(3b)³+3(2a)(3b)(2a+3b) (or) (2a)³+(3b)³+3(2a)²(3b)+3(2a)(3b)².
=8a³+27b³+18ab(2a+3b) (or) 8a³+27b³+3(4a²)(3b)+3(2a)(9b²).
=8a³+27b³+36a²b+54ab² (or) 8a³+27b³+36a²b+54ab².
Sorry I didn't understand other questions.
I think this is your answer.
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