\(xy+x+3y+3=0\)
\(\Rightarrow y\left(x+3\right)+\left(x+3\right)=0\)
\(\Rightarrow\left(x+3\right)\left(y+1\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x+3=0\\y+1=0\end{cases}\Rightarrow\orbr{\begin{cases}x=-3\\y=-1\end{cases}}}\)
\(xy+x+3y+3=0\)
\(x\left(y+1\right)+3\left(y+1\right)=0\)
\(\left(y+1\right)\left(x+3\right)=0\)
\(\Rightarrow\orbr{\begin{cases}y+1=0\\x+3=0\end{cases}\Rightarrow\orbr{\begin{cases}y=-1\\x=-3\end{cases}}}\)
xy + x + 3y + 3 = 0
( x + 3 ) y + ( x + 3 ) = 0
( x + 3 ) ( y + 1 ) = 0
nên x +3 hoặc y + 1 phải = 0 ..........
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\(xy+x+3y+3=0\)
\(\Rightarrow\)\(y\left(x+3\right)+\left(x+3\right)=0\)
\(\Rightarrow\)\(\left(x+3\right)\left(y+1\right)=0\)
\(\Rightarrow\)\(\hept{\begin{cases}x+3=0\\y+1=0\end{cases}}\)\(\Rightarrow\)\(\hept{\begin{cases}x=-3\\y=-1\end{cases}}\)
\(xy+x+3y+3=0\)
\(x\left(y+1\right)+3\left(y+1\right)=0\)
\(\left(y+1\right)+\left(x+3\right)=0\)
\(\orbr{\begin{cases}x+1=0\\x+3=0\end{cases}\Rightarrow\orbr{\begin{cases}y=-1\\x=-3\end{cases}}}\)
Thank you everybody
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