Question

Calcule o valor numérico das expressões a seguir:

b) PRECISA DAR -2

C) Precisa dar 4 sobre 3

Answer 1

b) 
$\frac{(-3)^2-4}{-3+2}+ \frac{(-3)^3-3.(-3)+6}{-3-1}=$

$\frac{9-4}{-3+2}+ \frac{-27-3.(-3)+6}{-3-1}=$

$\frac{9-4}{-3+2}+ \frac{-27+9+6}{-3-1}=$

$\frac{5}{-1}+ \frac{-12}{-4}=$

$\frac{5}{-1}+3=$

$-5+3= -2$

c)
$\frac{(-2)^3+(-2)^2.6+(-2)+6}{(-2)^4-1}=$

$\frac{-8+4.6-2+6}{16-1}=$

$\frac{-8+24-2+6}{16-1}=$

$\frac{20}{15}= \frac{4}{3}$