Question

Resolva o sistema: 2x+y^2=4 e 3x-y=2

Answer 1

$\left \{ {{2x+y^2=4} \atop {3x-y=2}} \right. \\\\ *y=3x-2\\\\ *2x+(3x-2)^2=4\\\\2x+9x^2-12x+4=4\\\\9x^2-10x=0\\\\x=0\\\\9x-10=0\\\\x=\frac{10}{9}\\\\ *y=3(0)-2\\\\y=-2\\\\ *y=3(\frac{10}{9})-2\\\\y=\frac43\\\\\boxed{S:\{(0,-2),(\frac{10}{9},\frac43)\}}$