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1. ${(x - y)}^{3} = ?$

Answer: Option B

Explanation:

আমরা জানি, {(x - y)}^{2} = {(x + y)}^{2} =4xy \Rightarrow 6^{2} - 4 \times 8 = 36 - 32 = 4 \Rightarrow x - y = 2 \Rightarrow {(x - y)}^{3} = 2^{3} = 8 a n s

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