Question

tìm x và y sao cho:x-3=xy+2y

Answer 1

\(x-3=xy+2y\)

\(\Rightarrow xy+2y-x+3=0\)

\(\Rightarrow xy+2x-x-2=-5\)

\(\Rightarrow x\left(y+2\right)-1\left(x+2\right)=-5\)

\(\Rightarrow\left(x-1\right)\left(y+2\right)=-5\)

Xét ước:v

Answer 2

Ta có : \(xy+2y-x+3=0\)

\(\Leftrightarrow y\left(x+2\right)-\left(x+2\right)+5=0\)

\(\Leftrightarrow\left(x+2\right)\left(y-1\right)=-5\)

Rồi xét ước nha bạn.