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1. $a^{2} - b^{2} ও a^{3} + b^{3}$

Answer: Option A

Explanation:

a^{2} - b^{2} = (a + b) (a - b) a^{3} + b^{3} = (a + b) (a^{2} - a b + b^{2}) .' . a^{2} - b^{2} ও a^{3} + b^{3} = (a + b)

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