Polynomial Root Analysis 25E7B4
1. **Problem Statement:** We need to determine which polynomial matches the graph described.
The graph has:
- A repeated root at $-1$ with a local maximum (indicating even multiplicity and negative leading coefficient).
- A root at $3$ where the graph crosses the x-axis (indicating odd multiplicity).
2. **Recall:**
- A repeated root with even multiplicity causes the graph to touch and turn around at that root (a "flattened touch").
- A root with odd multiplicity causes the graph to cross the x-axis.
- The sign of the leading coefficient affects the end behavior of the graph.
3. **Analyze each option:**
- **A:** $f(x) = -(x + 1)^2(x - 3)$
- Root at $-1$ with multiplicity 2 (even), and negative leading coefficient.
- Root at $3$ with multiplicity 1 (odd).
- Matches the description: repeated root at $-1$ with local max (due to negative sign), crosses at $3$.
- **B:** $f(x) = (x - 3)^2(x + 1)$
- Root at $3$ with multiplicity 2 (even), root at $-1$ with multiplicity 1 (odd).
- Does not match the graph description.
- **C:** $f(x) = (x - 1)(x + 3)^2$
- Roots at $1$ and $-3$, not matching $-1$ and $3$.
- **D:** $f(x) = - (x + 3)(x - 3)^2$
- Roots at $-3$ and $3$, not matching $-1$ and $3$.
4. **Conclusion:** Option A matches the graph's roots, multiplicities, and behavior.
**Final answer:**
$$f(x) = -(x + 1)^2(x - 3)$$