প্রশ্নঃ
a3 + b3 = কত?
-
ক.
a3 + 3a2b + 3ab2 + b3
-
খ.
(a + b)3 + 3ab(a + b)
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গ.
(a + b)3 - 3ab(a + b)
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ঘ.
(a + b)(a2 + ab + b2)
উত্তরঃ গ
 a3 + 3a2b + 3ab2 + b3 খ) (a + b)3 + 3ab(a + b) গ) (a + b)3 - 3ab(a + b) ঘ) (a + b)(a2 + ab + b2) উত্তর: গ) (a + b)3 - 3ab(a + b)
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