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1. $2 (x^{2} + y^{2})$

Answer: Option B

Explanation:

দেওয়া আছে, x + y = 5, x y = 6 এখন, {(x + y)}^{2} = x^{2} + y^{2} + 2 x y > 5^{2} = x^{2} + y^{2} + 2 x 6 > x^{2} + y^{2} = 13 ∴ 2 (x^{2} + y^{2}) = 2 x 13 = 26

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