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Question

Evaluate (102)2 using suitable identity


  1. 4xy

  2. 4xz

  3. 4xz

  4. 4xyz


Solution

The correct option is A

4xy


Given that  (102)2
=  (100+2)2 
Using (a+b)2 = (a+b)2 = a2+2ab+b2

= (100)2+2(100)(2)+(2)2
= 10000 + 400 + 4
= 10404

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