Question

Tìm x biết: \(\left|x\right|-4=-2\)

Answer 1

\(\left|x\right|-4=-2\)

\(\Rightarrow\left[{}\begin{matrix}x-4=-2\\-x-4=-2\end{matrix}\right.\)\(\Rightarrow\left[{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)

Vậy..

Answer 2

|x|-4 = -2

: |2| - 4 = -2

Vậy kết que là 2 nha

Answer 3

\(\left|x\right|-4=-2\)

\(\Rightarrow\left|x\right|=-2+4\)

\(\Rightarrow\left|x\right|=2\)

\(\Rightarrow x=\left\{\pm2\right\}\)

Answer 4

\(\left|x\right|-4=-2\)

\(\left|x\right|=-2+4\)

\(\left|x\right|=2\)

=> \(\left\{{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)

Vậy; x= 2 hoặc x= -2

Answer 5

\(\left|x\right|-4=-2\)

\(\Rightarrow\left|x\right|=-2+4\)

\(\Rightarrow\left|x\right|=2\)

\(\Rightarrow\left[{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)

Vậy \(\left[{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)