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1. (x - y) = 2 এবং xy= 24 হলে (x + y) এর মান কত?

Answer: Option D

Explanation:

{(x + y)}^{2} = {(x - y)}^{2} + 4 x y \Rightarrow {(x + y)}^{2} = 2^{2} + 4.24 \Rightarrow {(x + y)}^{2} = 4 + 96 \Rightarrow {(x + y)}^{2} = 100 \Rightarrow x + y = 10

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