Q1 of 67 Page 87

Find the squares of:

37

Using the identity (a-b)2 = a2 + b2- 2ab


Here, 372 = (40 - 3)2


= 402 + 32 - 2×40×3


= 1600 + 9 - 240


= 1369


More from this chapter

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1

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31

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72

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166

 2

Find the squares of:

(i) 85


(ii) 115


(iii) 165