Here,
(a+b)3
= (a+b)(a+b)(a+b)
= (a+b)2 (a+b)
= (a2+2ab+b2) (a+b)
= a3+2a2b+ab2+a2b+2ab2+b3
= a3+3a2b+3ab2+b3
(Hence (a+b)3 = a3+3a2b+3ab2+b3
You can see the give 3-D video about the how to find the cube of (a+b)?
Here,
(a+b)3
= (a+b)(a+b)(a+b)
= (a+b)2 (a+b)
= (a2+2ab+b2) (a+b)
= a3+2a2b+ab2+a2b+2ab2+b3
= a3+3a2b+3ab2+b3
(Hence (a+b)3 = a3+3a2b+3ab2+b3
You can see the give 3-D video about the how to find the cube of (a+b)?
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