প্রশ্নঃ
1 - a2 + 2ab - b2 এর উৎপাদক কোনটি?
-
ক.
(1 + a - b)(1 - a + b)
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খ.
(1 + a + b)(1 - a + b)
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গ.
(1 + a + b)(1 - a - b)
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ঘ.
(1 - a + b)(1 - a - b)
উত্তরঃ ক
 (1 + a - b)(1 - a + b) খ) (1 + a + b)(1 - a + b) গ) (1 + a + b)(1 - a - b) ঘ) (1 - a + b)(1 - a - b) উত্তর: ক) (1 + a - b)(1 - a + b)
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