Question

Calcule o valor da expressão.

Answer 1

Resposta:

$- \frac{17}{45}$

Explicação passo-a-passo:

$(-\frac{2}{5})^{1} +\sqrt{\frac{49}{100} } .\frac{2}{3} - (-\frac{3}{2}) ^{-2} => -\frac{2}{5}^{} +\frac{7}{10} .\frac{2}{3} -\frac{1}{(-\frac{3}{2}) ^{2} } => -\frac{2}{5}^{} +\frac{14}{30} -\frac{1}{(\frac{9}{4}) ^{} } => -\frac{2}{5}^{} +\frac{14}{30} - \frac{4}{9} => \frac{-2.18 + 14 . 3 - 4 . 10}{90}^{} => \frac{-36 + 42 - 40}{90}^{} => \frac{-34}{30}^{} => \frac{-34:2}{90:2}^{} => \frac{-17}{45}^{} => - \frac{17}{45}^{}$