Polynomial Zeros
1. The problem asks us to analyze the polynomial \(P(x) = (x+2)^2 (x+3)^2 (x-1)^4 (2x+1)\), which is already factored.
2. First, identify the zeros (roots) of the polynomial by setting each factor equal to zero:
- \(x+2=0 \Rightarrow x=-2\)
- \(x+3=0 \Rightarrow x=-3\)
- \(x-1=0 \Rightarrow x=1\)
- \(2x+1=0 \Rightarrow x=-\frac{1}{2}\)
3. Determine the multiplicity of each root to understand the behavior of the graph at these points:
- Root \(x=-2\) has multiplicity 2 (even), so the graph touches the x-axis and bounces off.
- Root \(x=-3\) has multiplicity 2 (even), same behavior as above.
- Root \(x=1\) has multiplicity 4 (even), the graph touches and flattens at this root.
- Root \(x=-\frac{1}{2}\) has multiplicity 1 (odd), so the graph crosses the x-axis straight through.
4. The degree of the polynomial is \(2 + 2 + 4 + 1 = 9\), which is odd.
5. The leading term can be found by multiplying the leading terms of each factor:
- From \((x+2)^2\), leading term is \(x^2\)
- From \((x+3)^2\), leading term is \(x^2\)
- From \((x-1)^4\), leading term is \(x^4\)
- From \((2x+1)\), leading term is \(2x\)
Multiplying: \(x^2 \times x^2 \times x^4 \times 2x = 2x^{9}\)
6. Since the leading coefficient \(2 > 0\) and degree 9 is odd, the graph falls to \(-\infty\) as \(x \to -\infty\) and rises to \(+\infty\) as \(x \to +\infty\).
7. Summary:
- Roots at \(-3, -2, -\frac{1}{2}, 1\) with corresponding multiplicities.
- Graph touches x-axis at \(-3, -2, 1\) and crosses at \(-\frac{1}{2}\).
- End behavior determined by leading term \(2x^9\).
This information can be used to sketch the graph accurately.