Question

-11|x|=-22

Answer 1

\(-11.\left|x\right|=-22\\ \Leftrightarrow\left|x\right|=2\\ \Leftrightarrow\left[{}\begin{matrix}x=-2\\x=2\end{matrix}\right.\)

Answer 2

-11|x| = -22

\(\Leftrightarrow\)|x| = 2

\(\Leftrightarrow\)x \(\in\){2 ; - 2}

Answer 3

-11\(\left|x\right|=-22\)

<=> \(\left|x\right|=2\)

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

Vậy x={2;-2}

Answer 4

-11 |x| = -22

|x| = -22 : -11

|x| = 2

⇒ x ∈ { 2; -2 }

Answer 5

Ta có: \(-11\left|x\right|=-22\)

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

hay \(x\in\left\{2;-2\right\}\)

Vậy: \(x\in\left\{2;-2\right\}\)