True/False

A software quality assurance tester is reviewing a predictive model that uses the equation log⁡4(x+6)−log⁡4(2x+5)=−log⁡4x\log_4(x+6) - \log_4(2x+5) = -\log_4 x to determine a critical parameter, xx. After performing the initial algebraic steps, the tester finds potential solutions of x=−5x = -5 and x=1x = 1. The tester must reject x=−5x = -5 because substituting it into the original equation results in taking the logarithm of a negative number, making it an extraneous solution.

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Updated 2026-09-19

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Ch.10 Exponential and Logarithmic Functions - Intermediate Algebra @ OpenStax

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