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Xoma163
@Xoma163
July 2022
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Система
x/y=2
x*y=8
Нужно найти x и y.
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sedinalana
Verified answer
X=2y
2y*y=8
y²=4
y1=-2⇒x1=-4
y2=2⇒x2=4
(-4;-2);(4;2)
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Thanks 0
тим7
X/y=2
x*y=8
x=2y
x=8/y
2y=8/y
2y^2=8
y^2=4
(y-2)(y+2)=0
y1=2 y2=-2
x1=2*2=4 x2=2*-2=-4
Ответ: (4;2), (-4;-2).
2 votes
Thanks 1
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Answers & Comments
Verified answer
X=2y2y*y=8
y²=4
y1=-2⇒x1=-4
y2=2⇒x2=4
(-4;-2);(4;2)
x*y=8
x=2y
x=8/y
2y=8/y
2y^2=8
y^2=4
(y-2)(y+2)=0
y1=2 y2=-2
x1=2*2=4 x2=2*-2=-4
Ответ: (4;2), (-4;-2).