Exercício Resolvido de Inequações
b)
\( (x^{2}-x)(x+1)(x^{2}-1)\geqslant 0 \)
\[
(\underbrace{x^{2}-x}_{A})(\underbrace{x+1}_{B})(\underbrace{x^{2}-1}_{C})\geqslant 0
\]
\[
\begin{gathered}
x^{2}-x=0\\
x(x-1)\\
x=0\\
\text{ou}\\
x-1=0\\
x=1\\[5pt]
x=0\qquad \text{ou}\qquad x=1
\end{gathered}
\]
\[
\begin{gathered}
x+1=0\\[5pt]
x=-1
\end{gathered}
\]
\[
\begin{gathered}
x^{2}-1=0\\
x^{2}=1\\
x=\sqrt{1}\\[5pt]
x=-1\qquad \text{ou}\qquad x=1
\end{gathered}
\]
\[ \bbox[#FFCCCC,10px]
{V=\{-1\}\;\cup \;\left[\phantom{{}}\right.\;0;+\infty\;\left[\phantom{{}}\right.}
\]