pls help me in this question
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Please apply the identity (a+b)(a-b) = a2- b2 and you will got 1 And multiply it by ((3-1) = 2 )
by 2 and u will get your answer.
by 2 and u will get your answer.
vignesh251:
thank you for your try but can you send me an ellaborate form of this
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