Resposta :
[tex] - \frac{5}{4} \div ( - \frac{7}{2} ) = \frac{5}{4} \times \frac{2}{7} = \frac{5}{2} \times \frac{1}{7} = \frac{5}{14} [/tex]
[tex] - \frac{5}{4} \div ( - \frac{7}{2} ) = \frac{5}{4} \times \frac{2}{7} = \frac{5}{2} \times \frac{1}{7} = \frac{5}{14} [/tex]