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Polina09002
@Polina09002
July 2022
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Розв'язати систему рівнянь другого ступеня методом підстановки
{ xy-2y=4
y=x-2
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ник3709
{ху-2у=4;
{у=х-2;
х(х-2)-2(х-2)=4;
х^2-2х-2х+4-4=0;
х^2-4х=0;
х(х-4)=0;
х=0; х-4=0; х=4;
у=0-2=-2; у=4-2=2;
(0; -2), (4; 2).
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Answers & Comments
{у=х-2;
х(х-2)-2(х-2)=4;
х^2-2х-2х+4-4=0;
х^2-4х=0;
х(х-4)=0;
х=0; х-4=0; х=4;
у=0-2=-2; у=4-2=2;
(0; -2), (4; 2).