Algebra-1

Question Analysis
This question tests the understanding of the range of an even-degree polynomial with a negative leading coefficient.

Key Concept Explanation
For even-degree polynomials, the range depends on the leading coefficient. A negative leading coefficient means the graph opens downwards, and the range is , where is the maximum value.

Step-by-step Solution
1. Substitute :
Since , becomes , where .
2. Find the vertex of :
For , , . The vertex (maximum point, since ) occurs at:

Click "Show Answer" to reveal the answer and analysis