Question

x.y+x+y=6

Tìm x,y thuộc Z

Answer 1

x(y+1)+(y+1)-1=6

(x+1)(y+1)=7

<=>x+1=7va y+1=1

hoacx+1=-7va Y+1=-1

hoacx+1=1va y+1=7

hoacx+1=-1va y+1=-7

Answer 2

Kho..................wa.....................troi.....................thi......................lanh.................ret.......................ai........................tich..........................ung.....................ho........................minh.....................cho....................do....................lanh

Answer 3

x=5

y=3

tick nha