\(y=6-2xy\)
⇒\(y-6+2xy=0\)
\(y\left(2x+1\right)=6\)
Ta có bảng sau:
2x+1 | 1 | -1 | 3 | -3 |
y | 6 | -6 | 2 | -2 |
x | 0 | -1 | 1 | -2 |
Vậy \(\left\{{}\begin{matrix}x=0\\y=6\end{matrix}\right.;\left\{{}\begin{matrix}x=-1\\y=-6\end{matrix}\right.;\left\{{}\begin{matrix}x=1\\y=2\end{matrix}\right.;\left\{{}\begin{matrix}x=-2\\y=-2\end{matrix}\right.\)