1. **State the problem:** Solve the equation $$Z^{5} + Z^{3} + Z = 0$$ for $Z$.
2. **Use the factoring technique:** Notice that each term contains a factor of $Z$, so factor it out:
$$Z(Z^{4} + Z^{2} + 1) = 0$$
3. **Apply the zero product property:** For the product to be zero, either
$$Z = 0$$
or
$$Z^{4} + Z^{2} + 1 = 0$$
4. **Solve the quartic equation:** Let $x = Z^{2}$, then the equation becomes
$$x^{2} + x + 1 = 0$$
5. **Use the quadratic formula:**
$$x = \frac{-1 \pm \sqrt{1^{2} - 4 \cdot 1 \cdot 1}}{2 \cdot 1} = \frac{-1 \pm \sqrt{-3}}{2} = \frac{-1 \pm i\sqrt{3}}{2}$$
6. **Recall $x = Z^{2}$:** So
$$Z^{2} = \frac{-1 \pm i\sqrt{3}}{2}$$
7. **Find $Z$ by taking square roots:** Each complex number has two square roots, so there are four complex roots from this step.
8. **Summary of solutions:**
- One real root: $Z = 0$
- Four complex roots from solving $Z^{2} = \frac{-1 \pm i\sqrt{3}}{2}$
Thus, the equation has 5 roots in total, consistent with the degree of the polynomial.
**Final answer:**
$$Z = 0 \quad \text{or} \quad Z^{2} = \frac{-1 \pm i\sqrt{3}}{2}$$
Solve Polynomial 256F88
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