Preference

প্রশ্নঃ

a2 - 1 + 2b - b2 এর উৎপাদক কোনটি?

  1. ক.

    (a - b - 1) (a + b - 1)

  2. খ.

    (a - b + 1) (a + b - 1)

  3. গ.

    (a + b - 1)

  4. ঘ.

    (a - b + 1)

উত্তরঃ
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