e/ \(x^2-3x+2>0\\↔x^2-2x-x+2>0\\↔x(x-2)-(x-2)>0\\↔(x-1)(x-2)>0\\↔\begin{cases}x-1>0\\x-2>0\end{cases} \quad or\quad \begin{cases}x-1<0\\x-2<0\end{cases}\\↔\begin{cases}x>1\\x>2\end{cases}\quad or\quad \begin{cases}x<1\\x<2\end{cases}\\↔x>2\quad or\quad x<1\)
d/ \( 2x^2-7x+6≤0\\↔2x^2-4x-3x+6≤0\\↔2x(x-2)-3(x-2)≤0\\↔(2x-3)(x-2)≤0\\↔\begin{cases}2x-3≥0\\x-2≤0\end{cases}\quad or\quad \begin{cases}2x-3≤0\\x-2≥0\end{cases}\\↔\begin{cases}x≥\dfrac{3}{2}\\x≤2\end{cases}\quad or\quad \begin{cases}x≤\dfrac{3}{2}\\x≥2\end{cases}\\→2≥x≥\dfrac{3}{2}\)
