Question

tim số nguyên xy sao cho      x-2xy+y=0

Answer 1

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

\(\Leftrightarrow2x-4xy+2y=0\)

\(\Leftrightarrow2x-4xy+2y-1=-1\)

\(\Leftrightarrow2x.\left(1-2y\right)+\left(2y-1\right)=-1\)

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

\(\Rightarrow\hept{\begin{cases}2x-1=1\\1-2y=-1\end{cases}\Rightarrow\hept{\begin{cases}x=1\\y=1\end{cases}}}\)

\(\Rightarrow\hept{\begin{cases}2x-1=-1\\1-2y=1\end{cases}}\Rightarrow\hept{\begin{cases}x=0\\y=0\end{cases}}\)

Vậy...

Answer 2

thank for you chúc bạn hok tốt ^.^