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Question
Evaluate the following using identities:
(0.98)2
Solution
We have
(0.98)2 = [1 - 0.02]2
= (1)2 + (0.02)2 - 2 x 1 x 0.02
= 1 + 0.0004 - 0.04 [∵ a = 1, b = 0.02]
= 1.0004 - 0.04
= 0.9604
∴ (0.98)2 = 0.9604
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