Question

xer |x|2 - 5|x| = 6,​

Answer 1

Resposta:

x = -6 ou x = 6

Passo-a-passo

|x|² - 5|x| - 6 = 0

$\Delta =(-5)^2-4.1.(-6)\\\\\Delta=25+24=49\\\\|x|=\frac{-(-5)\pm7}{2.1}\\\\|x|=\frac{5+7}{2} \\\\|x|=6 \implies x=6~ou~x = -6\\\\ou\\\\|x|=\frac{-(-5)-7}{2} \\\\|x|=-1~(sem~soluc)$