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

A. 6
B. 6
C. 6
D. 6

Answer: Option B

Explanation:

দেওয়া আছে,

x^{2} + y^{23} = 25 এ ব ং x y = 12 : (x + y)^{2} = x^{2} + 2 x y + y^{2} = x^{2} + y^{2} + 2 x y = 25 + 2.12 = 25 + 24 (x + y)^{2} = 49 x + y = 7

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