1. **State the problem:** Find the zeros of the function $$f(x) = x^4 - x^3 - 12x^2$$ and sketch its graph.
2. **Factor the function:** Start by factoring out the greatest common factor (GCF) from all terms.
$$f(x) = x^2(x^2 - x - 12)$$
3. **Factor the quadratic:** Factor the quadratic expression inside the parentheses.
$$x^2 - x - 12 = (x - 4)(x + 3)$$
4. **Write the fully factored form:**
$$f(x) = x^2 (x - 4)(x + 3)$$
5. **Find the zeros:** Set each factor equal to zero and solve for $$x$$.
- $$x^2 = 0 \implies x = 0$$ (with multiplicity 2)
- $$x - 4 = 0 \implies x = 4$$
- $$x + 3 = 0 \implies x = -3$$
6. **Interpret multiplicity:** The zero at $$x=0$$ has multiplicity 2, meaning the graph touches the x-axis and bounces off at this point.
7. **Summary of zeros:**
- $$x = 0$$ (multiplicity 2)
- $$x = 4$$
- $$x = -3$$
8. **Graph behavior:**
- The graph crosses the x-axis at $$x = -3$$ and $$x = 4$$.
- The graph touches and bounces off the x-axis at $$x = 0$$.
- Since the leading term $$x^4$$ is positive, the ends of the graph rise to positive infinity.
**Final answer:** The zeros of $$f(x)$$ are $$x = 0$$ (multiplicity 2), $$x = 4$$, and $$x = -3$$.
Zeros Polynomial 538B56
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.