Solve and graph a quadratic inequality using a graph

The video tutorial covers solving and graphing inequalities, focusing on quadratic functions. It explains different methods to solve equations, such as factoring and using the square root property. The tutorial emphasizes understanding inequalities through graphing, particularly the function y = x^2 - 1, and identifying when the graph is less than zero. It also demonstrates testing values to verify inequalities, providing a comprehensive understanding of the topic.

What does it mean for the graph to be less than zero between -1 and 1?

Describe the process of checking values to determine if they satisfy the inequality.