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Question

Find the value of (1+2)2.


  1. 222

  2. 3+22

  3. 2+32

  4. 322


Solution

The correct option is B

3+22


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

(1+2)2=12+22+22

=1+2+22

=3+22

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