Use a Change of Base Formula to Evaluate the Given $\log _ { 5 } ( x + 7 ) + \log _ { 5 } ( x - 7 ) = 1$

question 238

Multiple Choice

Use a change of base formula to evaluate the given logarithm. Approximate to three decimal places.
- $\log _ { 5 } ( x + 7 ) + \log _ { 5 } ( x - 7 ) = 1$

• A) 54
• B) \(\frac { 246 } { 5 }\)
• C) 5
• D) \(3 \sqrt { 6 }\)