x-y=2 ও xy=12 হলে x+y=?

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Sep 21, 2012 07:38 PM 1 Answers
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AnswersBD Administrator Mar 16, 2013 12:47 PM
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(x+y)^2=(x-y)^2+4xy <--এই সূত্র দিয়ে করতে হবে।

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