Question

Tìm x∈Z, biết:

-lxl=-24

Answer 1

\(-\left|x\right|=-24\)

\(\Leftrightarrow\left|x\right|=24\)

\(\Leftrightarrow x=\pm24\)

\(S=\left\{\pm24\right\}\)

Answer 2

Ta có: \(-\left|x\right|=-24\)

\(\Leftrightarrow\left|x\right|=24\)

hay \(x\in\left\{24;-24\right\}\)

Vậy: \(x\in\left\{24;-24\right\}\)

Answer 3

    - |x| =   -24

⇔   |x| =    24

⇔    x  = ± 24 (TMĐK)

Vậy x ∈ { 24 ; -24 }

Answer 4

Giải 

-|x| = - 24

⇔ |x|= 24

Vậy x ∈ { ± 24}