Here is the graph of the equation $(2x - y + 3)(3x + 2y - 1)$, plotted as a contour plot. The colors represent different values of the function for various combinations of $x$ and $y$.

Would you like more details or explanations about the graph? Here are 5 related questions to expand on this:

1. How do contour plots help in visualizing multivariable functions?
2. Can this function have any specific real-world interpretations?
3. What would happen to the graph if we modify the coefficients of $x$ or $y$?
4. How can this function be used to find critical points (maximums or minimums)?
5. What is the significance of the zero level in the contour plot?

Tip: When analyzing complex multivariable functions, contour plots provide a great way to visualize how the function behaves over different regions.