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Q1 of 67 Page 87

Find the squares of:
166

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

Here, 72² = (170 - 4)²

= 170² + 4² - 2×170×4

= 28900 + 16 - 1360

= 27556

More from this chapter

1

Find the squares of:

72

1

Find the squares of:

37

2

Find the squares of:

(i) 85

(ii) 115

(iii) 165

3

Find the square of 1468 by writing this as 1465 + 3.

Questions · 67

5. Squares, Square-Roots, Cubes and Cube-Roots

1 2 3 4 5 1 2 3 4 1 1 1 1 2 3 1 1 1 1 1 2 2 2 2 2 2 3 4 5 1 2 3 1 2 3 4 5 6 1 1 1 1 1 2 2 2 3 1 2 2 2 2 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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