নিচের কোনটি সঠিক নয়?
 

A a² - b²= (a+b)(a-b)  

B a² + b²= (a+b)² - 2ab  

C a² + b²= (a+b)² + 2ab  

D (a+b)²= (a-b)² + 4ab

Solution

Correct Answer: Option C

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