Preference

প্রশ্নঃ

সমাধান করুনঃ x - y = 2a     ax + by = a2 + b2

  1. ক.

    x = 2a, y = 0

  2. খ.

    x = a, y = b

  3. গ.

    x = a - b, y = a + b

  4. ঘ.

    x = a + b, y = b - a

উত্তরঃ
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