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niksafronov
@niksafronov
July 2022
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Решите уравнение: xy+x-y=2.Если сможете подробно.
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mewnet
Xy+x-y=2
xy+x-y-1=1
x(y+1)-(y+1)=1
(x-1)(y+1)=1
1)x-1=1 ⇒ x=2
y+1=1 ⇒ y=0
2)x-1=-1 ⇒ x=0
y+1=-1 ⇒ y=-2
Ответ: (2;0), (0;-2)
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Answers & Comments
xy+x-y-1=1
x(y+1)-(y+1)=1
(x-1)(y+1)=1
1)x-1=1 ⇒ x=2
y+1=1 ⇒ y=0
2)x-1=-1 ⇒ x=0
y+1=-1 ⇒ y=-2
Ответ: (2;0), (0;-2)