Q2 of 59 Page 263

Evaluate the following by using suitable identities:

5092

Given: 5092 = (500 + 9)2 = (500)2 + 2(500)(9) + (9)2

= 2500 + 9000 + 81, where a = 500 and b = 9 in the identity (a + b)2 = a2 + 2ab + b2


= 11581


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