Q1 of 95 Page 72

Now compute the squares of these numbers in head:

10.2

(10.2)2 = (10 + 0.2)2

=(10)2 + 2×10×0.2 + (0.2)2


= 100 + 4 + 0.04


= 104.04


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Now compute the squares of these numbers in head:

105

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Now compute the squares of these numbers in head:

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10.2