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g) \( \frac{3}{(x-2)}+\frac{3}{x+2}=\frac{2}{x^{2}-1} \)

Ask by Chadwick Tyler. in South Africa
Mar 15,2025

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Answer

The solution to the equation is approximately \( x \approx -1.273684 \).

Solution

Solve the equation \( \frac{3}{(x-2)}+\frac{3}{x+2}=\frac{2}{x^{2}-1} \). Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{3}{\left(x-2\right)}+\frac{3}{x+2}=\frac{2}{x^{2}-1}\) - step1: Find the domain: \(\frac{3}{\left(x-2\right)}+\frac{3}{x+2}=\frac{2}{x^{2}-1},x \in \left(-\infty,-2\right)\cup \left(-2,-1\right)\cup \left(-1,1\right)\cup \left(1,2\right)\cup \left(2,+\infty\right)\) - step2: Remove the parentheses: \(\frac{3}{x-2}+\frac{3}{x+2}=\frac{2}{x^{2}-1}\) - step3: Multiply both sides of the equation by LCD: \(\left(\frac{3}{x-2}+\frac{3}{x+2}\right)\left(x-2\right)\left(x+2\right)\left(x^{2}-1\right)=\frac{2}{x^{2}-1}\times \left(x-2\right)\left(x+2\right)\left(x^{2}-1\right)\) - step4: Simplify the equation: \(6x^{3}-6x=2x^{2}-8\) - step5: Move the expression to the left side: \(6x^{3}-6x-\left(2x^{2}-8\right)=0\) - step6: Remove the parentheses: \(6x^{3}-6x-2x^{2}+8=0\) - step7: Factor the expression: \(2\left(3x^{3}-3x-x^{2}+4\right)=0\) - step8: Divide both sides: \(3x^{3}-3x-x^{2}+4=0\) - step9: Calculate: \(x\approx -1.273684\) - step10: Check if the solution is in the defined range: \(x\approx -1.273684,x \in \left(-\infty,-2\right)\cup \left(-2,-1\right)\cup \left(-1,1\right)\cup \left(1,2\right)\cup \left(2,+\infty\right)\) - step11: Find the intersection: \(x\approx -1.273684\) The solution to the equation \( \frac{3}{(x-2)}+\frac{3}{x+2}=\frac{2}{x^{2}-1} \) is approximately \( x \approx -1.273684 \).

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To solve the equation \( \frac{3}{(x-2)}+\frac{3}{(x+2)}=\frac{2}{(x^{2}-1)} \), we first notice that \( x^2 - 1 \) can be factored as \( (x-1)(x+1) \). Let's rewrite the equation with a common denominator: The common denominator for \( (x-2)(x+2) \) and \( (x-1)(x+1) \) is \( (x-2)(x+2)(x-1)(x+1) \). Multiplying through by the common denominator, we get: \[ 3(x+2)(x-1)(x+1) + 3(x-2)(x-1)(x+1) = 2(x-2)(x+2) \] Now we'll expand everything step by step. 1. Expanding \( 3(x+2)(x-1)(x+1) \): \[ (x-1)(x+1) = x^2 - 1 \] Hence, \[ 3(x+2)(x^2-1) = 3x^3 + 6x - 3x - 6 = 3x^3 + 3x - 6 \] 2. Expanding \( 3(x-2)(x-1)(x+1) \): Again, \[ (x-1)(x+1) = x^2 - 1 \] Hence, \[ 3(x-2)(x^2-1) = 3x^3 - 6x - 3x + 6 = 3x^3 - 9x + 6 \] 3. The left side of the original equation will then be: \[ 3x^3 + 3x - 6 + 3x^3 - 9x + 6 = 6x^3 - 6x \] 4. Now, looking at the right side, \( 2(x-2)(x+2) \): \[ 2(x^2 - 4) = 2x^2 - 8 \] Combining everything gives us: \[ 6x^3 - 6x = 2x^2 - 8 \] Moving all terms to one side: \[ 6x^3 - 2x^2 - 6x + 8 = 0 \] Now, we can factor or use numerical methods or the Rational Root Theorem to find solutions. Testing some simple rational roots (like 1 or -1): Testing \( x = 2 \): \[ 6(2)^3 - 2(2)^2 - 6(2) + 8 = 48 - 8 - 12 + 8 = 36 \text{ (not a root)} \] Testing \( x = 1 \): \[ 6(1)^3 - 2(1)^2 - 6(1) + 8 = 6 - 2 - 6 + 8 = 6 \text{ (not a root)} \] Testing \( x = -1 \): \[ 6(-1)^3 - 2(-1)^2 - 6(-1) + 8 = -6 - 2 + 6 + 8 = 6 \text{ (not a root)} \] Continuing this process or finding another way to factor might help lead to solutions. Ultimately from these contexts, you would simplify, gather terms, and use algebraic techniques to find the values of \( x \). To proceed to solve this polynomial we'd likely need to graph or further find roots.

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