Expand the following a) (a-2b-3) ^2 b) (2x-y+3z) ^2 c) (5a+b-3c) ^2d) – InterviewSolution

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Expand the following a) (a-2b-3) ^2 b) (2x-y+3z) ^2 c) (5a+b-3c) ^2d) (-a+3b+7c) ^2

Answer»

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Using (a+b)3=a3+b3+3ab(a+b)

=(3a)3+(2b)3+3(3A2B)(3a+2b)

=27a3+8b3+18ab(3a+2b)

=27a3+8b3+57a2b+36ab2

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