Solving Equations and Graphing Cubic Functions using Substitution Method

The video tutorial explains how to solve a cubic equation using the substitution method, plot the results on a graph, and find solutions by drawing a straight line to identify intersections. It covers the calculation of Y values, plotting coordinates, and interpreting the graph to find solutions.

What is the significance of the smooth curve in the graph of a cubic function?

How do you find the solutions of the equation X^3 - 2X^2 - X + 1 = 0?

What is the difference between the equations from Part A and Part C?

List the three solutions found from the graph.