Q : 6     Using identities, evaluate.

           (iii) 102^2

Answers (1)

Here we will use the identity :

                                                            (a+b)^2 = a^2 +2ab + b^2

So :                                        

                                                            102^2 = (100 + 2)^2 = 100^2 + 2(100)(2) + 2^2

or                                                                                               = 10000 + 400 + 4

                                                                                                  = 10404

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