№1 ху=4
2х-у=-2
ху=4
у=2х=2
х(2х=2)=4
2х^2+2х-4=0 /2
х^2+х-2=0
D=1=4*2=9
х1=(-1+3)/2=1
х2=(-1-3)/2=-2
у1=4
у2=-2
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№1 ху=4
2х-у=-2
ху=4
у=2х=2
х(2х=2)=4
2х^2+2х-4=0 /2
х^2+х-2=0
D=1=4*2=9
х1=(-1+3)/2=1
х2=(-1-3)/2=-2
у1=4
у2=-2