1. **State the problem:** Solve the equation $$\frac{1}{x + 6} + \frac{x}{x - 6} = \frac{2}{x^2 - 36}$$ for $x$.
2. **Recall the formula and rules:** The denominator $x^2 - 36$ can be factored as a difference of squares:
$$x^2 - 36 = (x + 6)(x - 6)$$
This will help us find a common denominator.
3. **Rewrite the equation with a common denominator:**
The common denominator is $(x + 6)(x - 6)$. Rewrite each term:
$$\frac{1}{x + 6} = \frac{x - 6}{(x + 6)(x - 6)}$$
$$\frac{x}{x - 6} = \frac{x(x + 6)}{(x - 6)(x + 6)}$$
The right side is already over $(x + 6)(x - 6)$.
4. **Combine the left side:**
$$\frac{x - 6}{(x + 6)(x - 6)} + \frac{x(x + 6)}{(x + 6)(x - 6)} = \frac{(x - 6) + x(x + 6)}{(x + 6)(x - 6)}$$
5. **Simplify the numerator:**
$$ (x - 6) + x(x + 6) = x - 6 + x^2 + 6x = x^2 + 7x - 6 $$
6. **Rewrite the equation:**
$$ \frac{x^2 + 7x - 6}{(x + 6)(x - 6)} = \frac{2}{(x + 6)(x - 6)} $$
7. **Multiply both sides by the common denominator to clear fractions:**
$$ \cancel{(x + 6)(x - 6)} \cdot \frac{x^2 + 7x - 6}{\cancel{(x + 6)(x - 6)}} = \cancel{(x + 6)(x - 6)} \cdot \frac{2}{\cancel{(x + 6)(x - 6)}} $$
which simplifies to
$$ x^2 + 7x - 6 = 2 $$
8. **Bring all terms to one side:**
$$ x^2 + 7x - 6 - 2 = 0 $$
$$ x^2 + 7x - 8 = 0 $$
9. **Factor the quadratic:**
We look for two numbers that multiply to $-8$ and add to $7$. These are $8$ and $-1$.
$$ (x + 8)(x - 1) = 0 $$
10. **Solve for $x$:**
$$ x + 8 = 0 \Rightarrow x = -8 $$
$$ x - 1 = 0 \Rightarrow x = 1 $$
11. **Check for restrictions:**
The original denominators cannot be zero:
$$ x + 6 \neq 0 \Rightarrow x \neq -6 $$
$$ x - 6 \neq 0 \Rightarrow x \neq 6 $$
Neither $-8$ nor $1$ are restricted values.
**Final answer:**
$$ \boxed{x = -8 \text{ or } x = 1} $$
Rational Equation 570F71
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