Question

Calculando o valor da expressão numérica (-3)^2×[-9+(-3)^3]÷(-3)^2, vamos obter o número
A)-36. B)+36
C)-27. D)+27
E)-18
Preciso de ajuda urgente​

Answer 1

$\sf (-3)^2\times[-9+(-3)^3]\div(-3)^2~=\\\\\\=~(-3)\times(-3)~\times~[-9~+~(-3)\times(-3)\times(-3)]~\div~ (-3)\times(-3)\\\\\\=~+9~\times~[-9~+~(-27)]~\div ~(+9)\\\\\\=~9~\times~[-9~-~27]~\div~9\\\\\\=~9~\times~[-36]~\div ~9\\\\\\=~-324~\div~9\\\\\\=~\boxed{\sf - 36}$

$\Huge{\begin{array}{c}\Delta \tt{\!\!\!\!\!\!\,\,o}\!\!\!\!\!\!\!\!\:\,\perp\end{array}}Qualquer~d\acute{u}vida,~deixe~ um~coment\acute{a}rio$