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Question
Evaluate using algebraic formula:
10.22
Evaluate
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Solution
10.22
Let’s take it as (10 + 0.2)2,
(10 + 0.2)2 = (10)2 + 2(10) (0.2) + (0.2)2 ...[Using (a + b)2 = a2 + 2ab + b2]
(10 + 0.2)2 = 100 + 2(2) + 0.04
(10 + 0.2)2 = 100 + 4 + 0.04
∴ (10 + 0.2)2 = 104.04
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Chapter 3: Expansions - EXERCISE A [Page 32]
