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Answer»

(a + b)2= a2+ b2+ 2ab

(a+b)2=a2+b2+2ab then (a+b)(a+b)=a(a+b)+b(a+b)=a2+ab+ba+b2=a2+b2+2ab

(a+b)2=a2 +b2 +2ab is formula.



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