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Which of the following is not satisfied by any solution of the system

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Which of the following is not satisfied by any solution of the system

  \begin{cases} x^2-xy-2y^2=4 \\ x^2+2xy+3y^2=3     \end{cases} ?

  • $x=-2y$
  • $9y=-x$
  • $x=-4y$
  • $y^2=1$
in Mathematics by Wooden (4,850 points)
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