Quadratic Solutions D685F1
1. **State the problem:** Find the solutions of the quadratic equation $$2x^2 + 3x = -8$$.
2. **Rewrite the equation in standard form:** Move all terms to one side:
$$2x^2 + 3x + 8 = 0$$
3. **Use the quadratic formula:** For an equation $$ax^2 + bx + c = 0$$, the solutions are given by
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
4. **Identify coefficients:** Here, $$a = 2$$, $$b = 3$$, and $$c = 8$$.
5. **Calculate the discriminant:**
$$\Delta = b^2 - 4ac = 3^2 - 4 \times 2 \times 8 = 9 - 64 = -55$$
6. **Since the discriminant is negative, the solutions are complex:**
$$x = \frac{-3 \pm \sqrt{-55}}{2 \times 2} = \frac{-3 \pm i\sqrt{55}}{4}$$
7. **Final answer:** The solutions are
$$x = \frac{-3 \pm i\sqrt{55}}{4}$$
This matches the option **-3 ± iā55 over 4**.