\(\Leftrightarrow\left[{}\begin{matrix}3x+2=2x+1\\3x+2=-2x-1\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}3x+2-2x-1=0\\3x+2+2x+1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x+1=0\\5x=-3\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=-\dfrac{3}{5}\end{matrix}\right.\)
/3x+2/=2x+1
<=> 3x+2=2x+1
<=>3x-2x=1-2
=> x=-1
điều kiện 2x+1>0 => x>-\(\dfrac{1}{2}\)
=>3x+2=2x+1 => x=-1 (loại)
=>3x+1=-2x-1 =>x=-\(\dfrac{3}{5}\) (loại)
=> phương trình vô nghiệm
