Question

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Answer 1

Answer:

1.(i) 19² - 18² = (19+18) (19-18) = 37

(ii) 23² - 22² =( 23 + 22)(23 - 22) = 45

2.Refer the attachment....it is not a perfect square

3.(i) 32.5

(ii) 23.5

(iii) 296

4. Diagonal² = 20² + 15² = 400 + 225 = 625

Diagonal = 25m

5.(i) 9

(ii) 3

(iii) 3 × 7 × 2 = 42

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