Ответ:
{х+у=6; ху=8} х=6-у; (6-у)у=8; 6у-у²=8; у²-6у+8=0
D=36-32=4; y1=(6-2)/2=2; y2=(6+2)/2=4
x1=6-2=4: x2=6-4=2
Ответ:4;2 или 2;4
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Ответ:
{х+у=6; ху=8} х=6-у; (6-у)у=8; 6у-у²=8; у²-6у+8=0
D=36-32=4; y1=(6-2)/2=2; y2=(6+2)/2=4
x1=6-2=4: x2=6-4=2
Ответ:4;2 или 2;4