If x + y = a and x - y = b, then 2xy = ?/ x + y = a এবং x - y = b হুলে, 2xy-এর মান কত?
2x + 3y এর বর্গফল কত?
2x2 + 6xy + 6y2
4x2 + 12xy + 9y2
4x2 + 6xy + 6y2
2x2 + 12xy + 6y2
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