Observe that the difference function has two x-intercepts. Use CALC zero to find both intercepts. You will need to answer three questions during this process. To set the Left Bound, enter any value of x near but a little to the left of the x-intercept. The Right Bound can be any value of x near but a little to the right of the x-intercept. For the Guess, use a value of x that is close to the intercept itself.
When the calculator asks each question, the graph is put into trace mode. Just type in the value of x you want, and a prompt will appear as you do. Finding the left x-intercept first, we used a left bound of -2, a right bound of -1, and a guess of -1.5. Make sure the x-values you enter when answering these questions are valid for the current window (between Xmin and Xmax). The coordinates of the zero are then displayed. |
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