\(\left(x+1\right)\left(y+1\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}x+1=0\\y+1=0\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}x=-1\\y=-1\end{matrix}\right.\)
\(\left(x+1\right)\left(y+1\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}x+1=0\\y+1=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-1\\y=-1\end{matrix}\right.\)
Vậy...............
Chúc bạn học tốt!!!
Vì \(\left(x+1\right)\left(y+1\right)=0\)
\(\Rightarrow x+1=0\) hoặc \(y+1=0\)
\(\Rightarrow x=-1;y=-1\)
Vậy \(\left(x;y\right)=\left(-1;-1\right)\)
