2x/y -এর সাথে কত যোগ করলে যোগফল একটি পূর্ণবর্গ হবে--
(x2 + y2)/x2
(x2 + y2)/y2
(y2 - x2)/y2
(x2 - y2)/y2
a = 2, b = 3 হলে 2a + 4b এর সাথে 2a2 +a - b যোগ করলে যোগফল কত হবে?
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