Question

write ll-x l -1 l without using absolute value notation.

Answer 1

\[y=||-x|-1|=||x|-1|\]
\[y=\left\{\begin{array}{l}-x-1\quad,\quad x\leq -1\\x+1\quad,\quad -1\leq x\leq 0\\-x+1\quad,\quad 0\leq x\leq 1\\x-1\quad,\quad x\geq 1\end{array}\right.\]

Answer 2

how did u know the range of the x? i could write the first part like -x-1=y but i do not know how to know the range.