Question

determine o resultado

($\frac{1}{2}$-$\frac{5}{2}$) x ($\frac{9}{4}$+$\frac{8}{5}$)

Answer 1

Resposta:

$( \frac{1}{2} - \frac{5}{2} ) \times ( \frac{9}{4} + \frac{8}{5} ) = - \frac{77}{10} = - 7.7$

Explicação passo-a-passo:

$( \frac{1}{2} - \frac{5}{2} ) \times ( \frac{9}{4} + \frac{8}{5} ) = \\ \\ \frac{1 - 5}{2} ( \frac{9}{4} + \frac{8}{5} ) = \\ \\ \frac{ - 4}{2} ( \frac{9}{4} + \frac{8}{5} ) = \\ \\ - 2( \frac{45}{20} + \frac{32}{20} ) = \\ \\ - 2 \times ( \frac{45 + 32}{20} ) = \\ \\ - 2 \times ( \frac{77}{20} ) = \\ \\ \frac{ - 2 \times 77}{20} = \\ \\ \frac{ - 154}{20} = \\ \\ - \frac{77}{10} = - 7.7$