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Multiple choice

Solve the following equations: $y^{2}(4x^{2} - 108) = x(x^{3} - 9y^{3}), 2x^{2} + 9xy + y^{2} = 108$.

  1. $(\pm 2\sqrt 3,\mp 2\sqrt 3)$
  2. $(\pm \sqrt 3, \mp\sqrt 3)$
  3. $(\pm 2\sqrt 5, 2\mp \sqrt 5)$
  4. $(2,5)$
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