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যদি $\left(x-y\right)^2=14$ এবং $xy=2$ হয়, তবে $x^2+y^2=$কত?

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যদি $\left(x-y\right)^2=14$ এবং $xy=2$ হয়, তবে $x^2+y^2=$কত?

Options :

  • (A) $40$
  • (B) $60$
  • (C) $50$
  • (D) $80$

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$x^2+y^2$

= $\left(x-y\right)^2+2xy$

= $14+2 \times 2$

= $18$

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