Question

quanto é (-15 ) ; (+5 ) conta

Answer 1

$\Large\boxed{\begin{array}{l}\sf na~divis\tilde ao~e~multiplicac_{\!\!,}\tilde ao\\\sf sinais~iguais\longrightarrow positivo\\\sf sinais~diferentes\longrightarrow negativo\\\sf (-15)\div(+5)=-3\end{array}}$