1. **State the problem:** We need to find the number of extraneous solutions for the equation $$\frac{2m}{2m+3} - \frac{2m}{2m-3} = 1$$.
2. **Identify restrictions:** The denominators cannot be zero, so:
$$2m+3 \neq 0 \Rightarrow m \neq -\frac{3}{2}$$
$$2m-3 \neq 0 \Rightarrow m \neq \frac{3}{2}$$
3. **Solve the equation:** Find a common denominator and combine terms:
$$\frac{2m(2m-3)}{(2m+3)(2m-3)} - \frac{2m(2m+3)}{(2m-3)(2m+3)} = 1$$
4. Simplify the numerator:
$$\frac{2m(2m-3) - 2m(2m+3)}{(2m+3)(2m-3)} = 1$$
5. Expand the numerator:
$$\frac{4m^2 - 6m - 4m^2 - 6m}{(2m+3)(2m-3)} = 1$$
6. Simplify numerator:
$$\frac{-12m}{(2m+3)(2m-3)} = 1$$
7. Multiply both sides by the denominator:
$$-12m = (2m+3)(2m-3)$$
8. Expand the right side:
$$-12m = 4m^2 - 9$$
9. Rearrange to standard quadratic form:
$$4m^2 + 12m - 9 = 0$$
10. Solve quadratic using the quadratic formula:
$$m = \frac{-12 \pm \sqrt{12^2 - 4 \cdot 4 \cdot (-9)}}{2 \cdot 4} = \frac{-12 \pm \sqrt{144 + 144}}{8} = \frac{-12 \pm \sqrt{288}}{8}$$
11. Simplify the square root:
$$\sqrt{288} = \sqrt{144 \cdot 2} = 12\sqrt{2}$$
12. So the solutions are:
$$m = \frac{-12 \pm 12\sqrt{2}}{8} = \frac{12(-1 \pm \sqrt{2})}{8} = \frac{3(-1 \pm \sqrt{2})}{2}$$
13. Check if solutions are extraneous by verifying they are not excluded values $m \neq \pm \frac{3}{2}$:
- For $m = \frac{3(-1 + \sqrt{2})}{2}$, approximate $\sqrt{2} \approx 1.414$, so $m \approx \frac{3(-1 + 1.414)}{2} = \frac{3(0.414)}{2} = 0.621$, which is allowed.
- For $m = \frac{3(-1 - \sqrt{2})}{2}$, $m \approx \frac{3(-1 - 1.414)}{2} = \frac{3(-2.414)}{2} = -3.621$, which is allowed.
14. Both solutions are valid and not extraneous.
**Final answer:** The equation has **0** extraneous solutions.
Extraneous Solutions 85568B
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