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  • Brainly User
2014-06-04T12:36:51+05:30

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According to algebraic identities you can easily say the answer is a² - b²
You can calculate it as follows :
(a-b)(a+b) = a² + ab - ab + b²
                 = a² - b²
2 5 2
  • Brainly User
2014-06-04T12:38:51+05:30
[a+b][a-b]=a^2-b^2 
this is an algebraic identity
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