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Mathematics

By using suitable identities, evaluate the following:

(103)3

Expansions

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Answer

(103)3 = (100 + 3)3

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

(100 + 3)3 = (100)3 + (3)3 + 3(100)(3)(100 + 3)

= 1000000 + 27 + 900(103)

= 1000000 + 27 + 92700

= 1092727

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