Ответ: (х1;у1)=(7;-1)
(х2;у2)=(7;1)
х=6+у^2
(6+у^2)×у^2=7
6у^2+у^4=7
у^4+6у^2-7=0
у^4=t
t^2+6t-7=0
D=36-4×(-7)=36+28=64
t1=-6-8/2=-14/2=-7
t2=-6+8/2=2/2=1
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Ответ: (х1;у1)=(7;-1)
(х2;у2)=(7;1)
х=6+у^2
(6+у^2)×у^2=7
6у^2+у^4=7
у^4+6у^2-7=0
у^4=t
t^2+6t-7=0
D=36-4×(-7)=36+28=64
t1=-6-8/2=-14/2=-7
t2=-6+8/2=2/2=1