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Complex fraction made of sums involving rational expressions: roodiem... Simplify. \( \frac{6}{\frac{6}{x-5}+2} \) \( \frac{27}{x-5}+9 \) \( \square \)

Ask by Rodriguez Osborne. in the United States
Jan 05,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

\[ \frac{3(x - 5)}{x - 2} \]

Solution

To simplify the complex fraction: \[ \frac{6}{\frac{6}{x-5} + 2} \] Let's follow these steps: 1. **Simplify the Denominator:** Start by simplifying the denominator of the complex fraction: \[ \frac{6}{x-5} + 2 \] To combine these terms, find a common denominator: \[ \frac{6}{x-5} + 2 = \frac{6 + 2(x - 5)}{x - 5} = \frac{6 + 2x - 10}{x - 5} = \frac{2x - 4}{x - 5} \] 2. **Rewrite the Original Fraction:** Substitute the simplified denominator back into the original complex fraction: \[ \frac{6}{\frac{2x - 4}{x - 5}} \] Dividing by a fraction is the same as multiplying by its reciprocal: \[ 6 \times \frac{x - 5}{2x - 4} \] 3. **Simplify the Expression:** Factor out common terms in the numerator and denominator: \[ 2x - 4 = 2(x - 2) \] So the expression becomes: \[ 6 \times \frac{x - 5}{2(x - 2)} = \frac{6}{2} \times \frac{x - 5}{x - 2} = 3 \times \frac{x - 5}{x - 2} \] Therefore, the simplified form is: \[ \frac{3(x - 5)}{x - 2} \] **Final Answer:** \[ \boxed{\dfrac{3(x - 5)}{\,x - 2\,}} \]

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Extra Insights

To simplify the complex fraction \( \frac{6}{\frac{6}{x-5}+2} \), you first need to combine the terms in the denominator. Start by finding a common denominator for \( \frac{6}{x-5} + 2 \), which is \( x-5 \). Rewrite \( 2 \) as \( \frac{2(x-5)}{x-5} \). This gives us: \[ \frac{6}{x-5} + 2 = \frac{6 + 2(x-5)}{x-5} = \frac{6 + 2x - 10}{x-5} = \frac{2x - 4}{x-5} \] Now, substitute this back into the original fraction: \[ \frac{6}{\frac{2x - 4}{x-5}} = 6 \cdot \frac{x-5}{2x-4} = \frac{6(x-5)}{2(x-2)} = \frac{3(x-5)}{x-2} \] Next, simplify the expression \( \frac{27}{x-5}+9 \). First rewrite \( 9 \) with a common denominator: \[ 9 = \frac{9(x-5)}{x-5} = \frac{9x - 45}{x-5} \] Now combine it with \( \frac{27}{x-5} \): \[ \frac{27 + (9x - 45)}{x-5} = \frac{9x - 18}{x-5} = \frac{9(x - 2)}{x - 5} \] Finally, you can present the simplified forms as: \[ \frac{3(x-5)}{x-2} \text{ and } \frac{9(x-2)}{x-5} \]

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