Final answer:
The original question contains a typo in the equation, making it unclear. To answer the student's question, the correct format of the equation would be required to substitute the point (7, 2, -5) to find the value or an equation of the form.
Step-by-step explanation:
It seems there is some confusion in the original question. The equation provided x² - 4y² z² yz = 48 is not properly formatted, and therefore, it's unclear what the actual question is asking for. However, if the goal is to substitute the given point (7, 2, -5) into an equation, it would typically involve plugging these values into the equation for x, y, and z, respectively. This would provide the value of the equation at that specific point. For example, if the correct equation was x² - 4y² + z² + yz, substituting the point would entail calculating 7² - 4(2²) + (-5)² + 2(-5), which does not equal 48. Therefore, we would need the correct equation to proceed.