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Question
Using suitable identities, evaluate the following.
(995)2
Solution
We have,
(995)2 = (1000 – 5)2
= (1000)2 + (5)2 – 2 × 1000 × 5 ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 1000000 + 25 – 10000
= 990025
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