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kozhanovaa
@kozhanovaa
July 2022
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Решить уравнение. См фото
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Burndays
(х+4)(у-2)=-7
(х-у)=2
=>
(х+4)(у-2)=-7
х= 2+у
=>
(2+y+4)(y-2)= -7
2y-4+y^2-2y+4y-8=-7
4y+y^2+7-4-8=0
y^2+4y-5=0
D=16+20=36=6^2
Y1,2= -4+-6/2
y1=1
y2=-5
x1=3
x2=-3
как то так
ну или примерно так
0 votes
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Answers & Comments
(х-у)=2
=>
(х+4)(у-2)=-7
х= 2+у
=>
(2+y+4)(y-2)= -7
2y-4+y^2-2y+4y-8=-7
4y+y^2+7-4-8=0
y^2+4y-5=0
D=16+20=36=6^2
Y1,2= -4+-6/2
y1=1
y2=-5
x1=3
x2=-3
как то так
ну или примерно так