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# hey help pls

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Let

$f(n) = \left\{ \begin{array}{cl} n^2-2 & \text{ if }n<0, \\ 2n-20 & \text{ if }n \geq 0. \end{array} \right.$

What is the positive difference between the two values of $a$ that satisfy the equation $f(-2)+f(2)+f(a)=0$?

Feb 20, 2021