Question

|a|=2

|a+2|=0

Answer 1

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

\(\left|a+2\right|=0\\ \Leftrightarrow a+2=0\\ \Leftrightarrow a=-2\)

Answer 2

*|a|=2

<=> a=\(\pm\)2

*|a+2|=0

<=>a+2=0

<=>a=-2