1. **State the problem:** Solve the equation $$\frac{8}{x} + \frac{1}{x+2} = -2$$ for $x$.
2. **Find a common denominator:** The denominators are $x$ and $x+2$. The common denominator is $x(x+2)$.
3. **Rewrite each term with the common denominator:**
$$\frac{8(x+2)}{x(x+2)} + \frac{1 \cdot x}{x(x+2)} = -2$$
4. **Combine the fractions:**
$$\frac{8(x+2) + x}{x(x+2)} = -2$$
5. **Multiply both sides by $x(x+2)$ to clear the denominator:**
$$8(x+2) + x = -2x(x+2)$$
6. **Expand both sides:**
$$8x + 16 + x = -2x^2 - 4x$$
7. **Combine like terms on the left:**
$$9x + 16 = -2x^2 - 4x$$
8. **Bring all terms to one side to set equation to zero:**
$$2x^2 + 9x + 4x + 16 = 0$$
$$2x^2 + 13x + 16 = 0$$
9. **Use the quadratic formula to solve for $x$:**
The quadratic formula is $$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$ where $a=2$, $b=13$, and $c=16$.
10. **Calculate the discriminant:**
$$\Delta = b^2 - 4ac = 13^2 - 4 \cdot 2 \cdot 16 = 169 - 128 = 41$$
11. **Find the roots:**
$$x = \frac{-13 \pm \sqrt{41}}{2 \cdot 2} = \frac{-13 \pm \sqrt{41}}{4}$$
12. **Final answer:**
$$x = \frac{-13 + \sqrt{41}}{4}, \frac{-13 - \sqrt{41}}{4}$$
These are the simplified exact solutions.
Solve Rational Ee646D
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