Question

preciso do desenvolvimento e cálculo ​

Answer 1

Explicação passo-a-passo:

Vamos lá!

$\frac{3}{4}-[\frac{1}{5}+(\frac{1}{2})^2 / \frac{3}{5}] =\\\\=\frac{3}{4}- [\frac{1}{5}+(\frac{1}{2}. \frac{1}{2}) /\frac{3}{5} ]\\\\=\frac{3}{4}-[\frac{1}{5}+\frac{1}{4} /\frac{3}{5}]\\\\=\frac{3}{4}-[\frac{1}{5}+\frac{5}{12}]\\\\=\frac{3}{4} -[\frac{12.(1)+5.(5)}{60}]\\\\=\frac{3}{4}-[\frac{12+25}{60}]\\\\=\frac{3}{4}-[\frac{37}{60} ]\\\\=\frac{3}{4} -\frac{37}{60}\\\\=\frac{15.(3)-1.(37)}{60} \\\\=\frac{45-37}{60}\\\\=\frac{8}{60}= \frac{2}{15}$