Question

(-18)x(-30) in distributive property​

Answer 1

$\left(-18\right)x\left(-30\right)\\\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a,\:-\left(-a\right)=a\\=18x\cdot \:30\\\mathrm{Multiply\:the\:numbers:}\:18\cdot \:30=540\\=540x$