1. **State the problem:** Solve the quadratic equation $$64x^2 + 5x + 25 = 0$$.
2. **Formula used:** The quadratic formula for solving $$ax^2 + bx + c = 0$$ is
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$.
3. **Identify coefficients:** Here, $$a = 64$$, $$b = 5$$, and $$c = 25$$.
4. **Calculate the discriminant:**
$$\Delta = b^2 - 4ac = 5^2 - 4 \times 64 \times 25 = 25 - 6400 = -6375$$.
5. Since $$\Delta < 0$$, the equation has no real roots but two complex roots.
6. **Apply the quadratic formula:**
$$x = \frac{-5 \pm \sqrt{-6375}}{2 \times 64} = \frac{-5 \pm i\sqrt{6375}}{128}$$.
7. **Simplify the square root:**
$$6375 = 25 \times 255 = 25 \times 15 \times 17$$
$$\sqrt{6375} = \sqrt{25 \times 255} = 5\sqrt{255}$$.
8. **Final solution:**
$$x = \frac{-5 \pm 5i\sqrt{255}}{128} = \frac{-5}{128} \pm \frac{5i\sqrt{255}}{128}$$.
Thus, the two complex solutions are
$$x = \frac{-5}{128} + \frac{5i\sqrt{255}}{128}$$ and $$x = \frac{-5}{128} - \frac{5i\sqrt{255}}{128}$$.
Quadratic Complex Roots B4C414
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