\(\displaystyle{a}.-{2}\leq{\left\lbrace{x}\right\rbrace}\leq{\left\lbrace{3}\right\rbrace}\)

\(\displaystyle{b}.{x}={4}{\quad\text{and}\quad}{x}=-{2}\)

\(\displaystyle{c}.-{5}{<}{x}{<}{4}\)</span>

\(\displaystyle{d}.{x}={1.5}\pm{0},{5}{i}\)

\(\displaystyle{b}.{x}={4}{\quad\text{and}\quad}{x}=-{2}\)

\(\displaystyle{c}.-{5}{<}{x}{<}{4}\)</span>

\(\displaystyle{d}.{x}={1.5}\pm{0},{5}{i}\)