Question

Urgente, se alguém puder me ajudar fico agradecida rs

Answer 1

$Ola~~~\mathbb{VIVI} \\ \\ Sendo~a ~express\~ao:~\boxed{E_{(x)}=- x^{2} + \frac{3 x}{2}- \frac{5}{x} } \\ \\ Calculemos~E_{(-1)}~~~--\ \textgreater \ substituindo~temos: \\ \\ E_{(-1)}=-(-1)\²+ \frac{3(-1)}{2} - \frac{5}{(-1)} ~~~--\ \textgreater \ desenvolvendo~temos \\ \\ E_{(-1)}=-1- \frac{3}{2}+5 \\ \\ \boxed{\boxed{E_{(-1)}= \frac{5}{2}}}$


$======================================= \\ Calculemos~E_{( \frac{2}{3}) }~~~~---\ \textgreater \ substituindo~temos: \\ \\ E_{( \frac{2}{3}) }=-( \frac{2}{3} )\²+ \frac{3( \frac{2}{3} )}{2}- \frac{5}{ \frac{2}{3} }~~~~---\ \textgreater \ desenvolvendo~temos: \\ \\ E_{( \frac{2}{3} )}=- \frac{4}{9}+1- \frac{15}{2} \\ \\ \boxed{\boxed{E_{( \frac{2}{3} )}= -\frac{125}{18} } } \\ \\ \mathbb{vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv}\\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Espero~ter~ajudado!!$