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Please help Solve f(x)<0

Please help Solve f(x)<0-example-1

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Look at the picture.



f(x) < 0\ for\ x\in\left<-5,\ -2\right)\ \cup\ \left(2,\ 5\right>


f(x) < 0\ for\ -5\leq x < -2\ and\ 2 < x \leq5

Please help Solve f(x)<0-example-1