Hey guys, I'm really confused on how to express an absolute value into a piece-wise function. Such as: $\displaystyle |x-4|$
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$\displaystyle |x-4|=\left\{\begin{array}{ll}x-4, & x-4\geq 0\\-x+4, & x-4<0\end{array}\right.=\left\{\begin{array}{ll}x-4, & x\geq 4\\-x+4, & x<4\end{array}\right.$
Ok awesome thanks a lot I always get confused by the negative row.
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