1. **Problem Statement:** Given the polynomial function $$f(x) = (x - 7)^3 (x + 8)^2,$$ we need to find:
(a) The real zeros and their multiplicities.
(b) Whether the graph crosses or touches the x-axis at each zero.
(c) The maximum number of turning points.
(d) The end behavior of the graph.
2. **Finding Real Zeros and Multiplicities:**
The zeros occur where each factor equals zero:
- From $(x - 7)^3$, zero at $x = 7$ with multiplicity 3.
- From $(x + 8)^2$, zero at $x = -8$ with multiplicity 2.
3. **Behavior at Each Zero:**
- For multiplicity 3 (odd), the graph **crosses** the x-axis at $x=7$.
- For multiplicity 2 (even), the graph **touches** but does not cross the x-axis at $x=-8$.
4. **Maximum Number of Turning Points:**
The degree of $f(x)$ is $3 + 2 = 5$.
The maximum number of turning points is one less than the degree:
$$5 - 1 = 4.$$
5. **End Behavior:**
For large $|x|$, the function behaves like the leading term:
$$f(x) \approx x^3 \cdot x^2 = x^5.$$
Since the leading coefficient is positive and degree is odd, as $x \to \infty$, $f(x) \to \infty$, and as $x \to -\infty$, $f(x) \to -\infty$.
**Final answers:**
(a) Real zeros: $7$ (multiplicity 3), $-8$ (multiplicity 2).
(b) Crosses at $x=7$, touches at $x=-8$.
(c) Maximum turning points: 4.
(d) End behavior resembles $x^5$.
Polynomial Zeros 719654
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