1. The problem is to understand how to perform calculations or solve equations using a Graphical Display Calculator (GDC). 2. A GDC is a tool that can graph functions, solve equations, and perform various calculations. 3. To use a GDC for solving equations, you typically enter the equation into the calculator's equation solver or graph the function and find the roots. 4. For example, to solve $x^2 - 4 = 0$ on a GDC, you can either use the solver function or graph $y = x^2 - 4$ and find where the graph crosses the x-axis. 5. The roots are the x-values where $y=0$, which are $x=2$ and $x=-2$. 6. Always refer to your specific GDC's manual for exact button sequences and features.