Question

Solve |x|=5

A{-5}
B{5}
C{-5,5}

Answer 1

C is your answer
use absolute value

Answer 2

`x=-5\quad \mathrm{or}\quad \:x=5`

C is your answer

Explanation:

`\left|x\right|=5\\\mathrm{Apply\:absolute\:rule}:\quad\mathrm{If}\:|u|\:=\:a,\:a>0\:\mathrm{then}\:u\:=\:a\:\quad \mathrm{or}\quad \:u\:=\:-a\\x=-5\quad \mathrm{or}\quad \:x=5`