Question

agora efetue

a,(-8\5) elevado a 2=
b,(-7\5).(-1\5)=
c,3\4.(-8)=
d,(-1\5)elevado a 2 dividido por 2\6=

Answer 1

$a) \ (-\frac{8}{5})^2 = -\frac{8}{5} \cdot (-\frac{8}{5}) = \frac{8^2}{5^2} = \frac{64}{25} = 2,56 \\\\ b) \ (-\frac{7}{5}) \cdot (-\frac{1}{5}) = \frac{7}{25} = 0,28 \\\\ c) \ \frac{3}{4} \cdot (-8) = -\frac{24}{4} = 6 \\\\ d) \ (-\frac{1}{5})^2 : \frac{2}{6} = \frac{1^2}{5^2} : \frac{1}{3} = \frac{1}{25} \cdot 3 = \frac{3}{25} = 0,12$