Question

Qual será os possíveis valores para x na sentença: І x І = 12

Answer 1

$\sf \left|x\right|=12\\\\\\\sf {Aplique\:as\:propriedades\:dos\:valores\:absolutos}:\quad Se}\:|u|\:=\:a,\:a>0\:{entao}\:u\:=\:a\:\quad {ou}\quad \:u\:=\:-a\\\\\\\sf \to\boxed{\sf x=12}\\\sf \to\boxed{\sf x=-12}$