Exercício Resolvido de Inequações
a)
\( x^{2}-2x+1\geqslant 0 \)
\[
\begin{gathered}
x^{2}-2x+1=0\\[5pt]
\Delta=b^{2}-4ac=(-2)^{2}-4.1.1=4-4=0\\[5pt]
t=\frac{-b\pm\sqrt{\Delta \;}}{2a}=\frac{-(-2)\pm\sqrt{0\;}}{2.1}=\frac{2}{2}\\[5pt]
x=1
\end{gathered}
\]
\[ \bbox[#FFCCCC,10px]
{V=\mathbb{R}}
\]