Exercício Resolvido de Inequações
b)
\( (2x-1).(-3x+2).(x+1)\geqslant 0 \)
\[
(\underbrace{2x-1}_{A}).(\underbrace{-3x+2}_{B}).(\underbrace{x+1}_{C})\geqslant 0
\]
\[
\begin{gathered}
2x-1=0\\
2x=1\\
x=\frac{1}{2}
\end{gathered}
\]
\[
\begin{gathered}
-3x+2=0\\
3x=2\\
x=\frac{2}{3}
\end{gathered}
\]
\[
\begin{gathered}
x+1=0\\
x=-1
\end{gathered}
\]
\[ \bbox[#FFCCCC,10px]
{V=\left.\phantom{{}}\right]\;-\infty;-1\;\left.\phantom{{}}\right]\;\cup\;\left[\phantom{{\frac{}{}}}\right.\;\frac{1}{2};\frac{2}{3}\;\left.\phantom{{\frac{}{}}}\right]}
\]