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WWW.MATHEMATICATOR.COM How to easily solve a quadratic inequality? First, we solve the quadratic equation. So we find the intersections of the parabola (which is the graph of a quadratic function) with the X-axis. We draw the graph and look at the solution. Related videos: Quadratic inequality - How to do it • Quadratic inequality - How to do it Quadratic inequality - example 1 • Quadratic inequality - example 1 Quadratic inequalities - special cases • Quadratic inequalities - special cases... Quadratic function - theory • Quadratic function - theory Quadratic function - graph - example 1 • Quadratic function - graph - example 1 Quadratic equation - how to do it - decomposition and discriminant • Quadratic equation - how to do it - discriminant • Quadratic equation - how to do it - decomposition - diagram • Quadratic equation - solution relation with ...