Algebra-1

Question Analysis
This question evaluates the student's ability to solve a quadratic equation with a negative leading coefficient and no linear term. The equation is in the form , and the student must isolate and then take the square root of both sides.

Key Concept Explanation
When the linear coefficient is zero, the quadratic equation simplifies to . To solve this, we isolate by moving the constant term to the other side, divide by the leading coefficient, and then take the square root of both sides.

Step-by-step Solution
1. Start with the given equation:
2. Subtract 72 from both sides to isolate