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1. $x^{2} + y^{2} = 8$

A. ২০
B. ২০
C. ২০
D. ২০

Answer: Option B

Explanation:

দেওয়া আছে,

x^{2} + y^{2} = 8 x y = 11

আমরা জানি,

{(x + y)}^{2} = x^{2} + y^{2} + 2 x y = 8 + 2 X 11 = 30

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