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l.h.s=(a+b)2 =>a2+b2+2ab =>{(a-b)2+2ab}+2ab =>(a-b)2+4ab

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আমি অনেক সহজে প্রমান করলাম, যাতে আপনি সহজেই বুঝতে পারেন। (a+b)২ = (a-b)২+4ab Proof: (a-b)২+4ab = (a২-2.a.b+b২)+4ab = a২+b২-2ab+4ab = (a২+b২)+2ab = {(a+b)২-2ab}+2ab = (a+b)২-2ab+2ab = (a+b)২ [Proved]

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L.H.S =(a+b)^2 =a^2+2ab+b^2 =a^2-2ab+b^2+4ab =(a-b)^2+4ab =R.H.S .'. L.H.S.=R.H.S (প্রমাণিত)

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