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Question
Using suitable identities, evaluate the following.
(1005)2
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Solution
We have,
(1005)2 = (1000 + 5)2
= (1000)2 + 52 + 2 × 1000 × 5 ...[Using the identity, (a + b)2 = a2 + b2 + 2ab]
= 1000000 + 25 + 10000
= 1010025
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