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Write each of the following expressions without using absolute value. |z−7|−|z−9|, if z<7

Write each of the following expressions without using absolute value. |z−7|−|z−9|, if z<7
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Write each of the following expressions without using absolute value. |z−7|−|z−9|, if z<7

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User Snowman
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Here is one way.


\left\{ \begin{array}{rcl}-2&amp;\mbox{for}&amp;z < 7\\2(z-8)&amp;\mbox{for}&amp;7\le z\le9\\2&amp;\mbox{for}&amp;9 < z\end{array}\right\,
Write each of the following expressions without using absolute value. |z−7|−|z−9|, if-example-1
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User Epligam
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