Question

calcule o valor de casa expressão me ajuda​

Answer 1

a)

$A={(\frac{3}{4}) }^{2}. {(-2)}^{3} \\ \frac{9}{16}.(-8)= -\frac{9}{2}$

b)

$B=625.160.{2}^{-4}. {25}^{-3}$

$B={25}^{2}.10.{2}^{4}.{2}^{-4}.{25}^{-3} \\ {25}^{-1}. 10 \\ \frac{10}{25}=\frac{2}{5}$