Question

qual o valor da expressão (-7) .(-8) .(+3)​

Answer 1

Olá

$\tt Pergunta =>\boxed{\sf \left(-7\right)\:\cdot \left(-8\right)\:\cdot \left(+3\right)}$

Lembre das Regras de sinais =>

$\sf (+)(+) = + \\\\ \sf (-)(-) = +\\\sf (+)(-) = \\ \\ \sf (-)(+) =$

Vamos ao que interessa =>

$\sf \left(-7\right)\:\cdot \left(-8\right)\:\cdot \left(+3\right)\\\\\\\sf Lembre \ da \ Regra \to \left(-a\right)\cdot \left(-b\right)\:=\:a\cdot \:b\\\\\\\sf \left(-7\right)\left(-8\right)=7\cdot \:8=56\\\\\\\sf =56\left(3\right)\\\\\\\boxed{\boxed{\sf =168}}$

$\large \boxed{\boxed{\tt ATT: CODE \ PEN }}$