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Question

Factorize 98(a+b)22 


  1. 2(7a+7b+1)(7a+7b1)

  2. 98(a+b+1)(a+b1)

  3. 2(7a+7b+1)

  4. (a+b+1)(a+b1) - 2


Solution

The correct option is A

2(7a+7b+1)(7a+7b1)


Given 98(a+b)22 
         =2(49(a+b)2)1)
         =2((7(a+b))21)
         =2(7a+7b+1)(7a+7b1)

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