A Quadratic Equation Solver
Review the loan calculator example from Section 15.7. Also review the quadratic formula, naturally.
Create graphical user interface program for solving the quadratic equations ax2 + bx + c = 0. The user will
enter values for a, b, and c into text fields and press a “Solve” button. The program will then display a list
of the roots in a text field.
Your interface should look similar to the above. I suggest that you use a BorderPane as the root node of
the scene. Using an HBox to hold the four labels and four text fields works well, as does an HBox to hold
the “Solve” button. The unicode for a superscripted 2 is “\u00B2”. Recall from th