Preference

প্রশ্নঃ

a - b + b(a - b)a - b = কত?

  1. ক.

    1 + ba - b

  2. খ.

    (a - b)(1 + b)a - b

  3. গ.

    a + b

  4. ঘ.

    1 + b

উত্তরঃ
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