Question

решите систему уравнений$left { {{4 x^{2} -y=2} atop {3 x^-2y=-1}}$

Answer 1

$y = 1.5 x + 0.5$
$4x^2 - 1.5x - 0.5 = 2$
$4x^2 - 1.5x - 2.5 = 0$
$8x^2 - 3x - 5 = 0$
$D=9+160=169$
$x_{1} = frac{3+13}{16} = 1$
$x_{2} = frac{3-13}{16} = -0.625$
$y_{1} = 2$
$y_{2} = -0.4375$