Final answer:
Quadratic inequalities can be solved using different methods, including the graphical method, factoring method, and completing the square method.
Step-by-step explanation:
The solution to a quadratic inequality can be found using various methods. One method is the graphical method, where you plot the graph of the quadratic equation and identify the range of x-values that satisfy the inequality. Another method is the factoring method, where you factor the quadratic equation and determine the intervals in which it is positive or negative. The third method is the completing the square method, where you rewrite the quadratic equation in the form (x-h)²=k and use it to find the solution.