Respuesta :

maandasidaela

Step-by-step explanation:

  • extract the third equation from one of the given equation by making at most one variable with 1 as the coefficient the subject of the equation.
  • [tex] x = 2 - y...........(3)[/tex]
  • now substitute the third equation to the other equation *Not the one you extracted the new equation from*
  • [tex]y = 2 ({2 - y})^{2} + (2 -y ) - 2[/tex]
  • After substituting simplify
  • [tex]y = 2(2 - y)(2 - y) + 2 - y - 2 \\ y = 2(4 - 2y - 2y + {y}^{2} ) + 2 - y - 2 \\ y = 2(4 - 4y + {y}^{2} ) - y \\ y = 8 - 8y + 2 {y }^{2} - y[/tex]
  • Therfore group the terms in the form of a general Quadratic equation.

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