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Question
Evaluate the following, using suitable identity
9982
Sum
Solution
9982 = (1000 – 2)2
Taking a = 1000 and b = 2
(a – b)2 = a2 – 2ab + b2 becomes
= 10002 – 2(1000)(2) + 22
= 1000000 – 4000 + 4
9982 = 9,96,004
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Chapter 3: Algebra - Exercise 3.1 [Page 62]
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