Quadratic inequalities are mathematical expressions involving a second-degree polynomial and an inequality sign. They are crucial in algebra and have various real-world applications. This guide explains how to solve quadratic inequalities using graphical and algebraic methods, focusing on the parabola's position and its intersections with the x-axis.
Key points:
• Understanding the parabola's orientation is essential for solving quadratic inequalities
• The solution depends on the sign of the coefficient of x²
• Solving involves finding roots and analyzing intervals
• Different cases arise based on the discriminant's value
• Graphical representation aids in visualizing solutions