Question

\(|5x|-3x-2=0\)

Answer 1

`|5x|-3x-2=0`

`<=>|5x|=3x+2(x>=-2/3)`

`+)5x=3x+2`

`<=>2x=2`

`<=>x=1(tm)``

`+)-5x=3x+2`

`<=>8x=-2`

`<=>x=-1/4(tm)`

Vậy `S={1,-1/4}`

Answer 2

\(\left|5x\right|-3x-2=0\)

\(\Leftrightarrow\left|5x\right|=3x+2\)

TH1: x ≥ 0 

⇒ 5x = 3x + 2

⇔ x = 1 (tm)

TH2: x < 0 

⇒ 5x = -3x - 2

⇔ x = -1/4 (tm)

Vậy...