Question

3х+у=2, х^(2)-у^(2)=-12

Answer 1

смотри во вложения!!!!!!!!!!!!!!!!!!!!!!!

Answer 2

y=2-3x

x^2-4+12x-9x^2+12=0

-8x^2+12x+8=0

2x^2-3x-2=0

D=9+16=25=5^2

x1=2

x2=-0.5

y1=-4

y2=3.5