4х+3у=-1; 2х²-у=11; 4х+3у=-1; у=2х²-11; 4х+3(2х²-11)=-1; у=2х²-11; 4х+6х²-33=-1; у=2х²-11; 6х²+4х-32=0; у=2х²-11; D=16+768=784. √D=28; x₁=(-4+28)/12=2; x₂=(-4-28)/12=-8/3=-2⅔. y₁=-3; y₂=128/9-99/9=27/9=3. Ответ: (2;-3), (-2⅔;3).