Solving square inequality
Definition: Square inequality — nerst of view 
, if 
As razvesti square inequality
To razvezti square inequality, it suffices to find the roots of quadratic equations and construct a sketch of the graph (a parabola).
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When 
When 
When 
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When 
When 
When 
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If the quadratic equation has two interchanges 
, the inequality can be rozwiazanie method of intervals.