Answer
$\ln \left [\frac{(x+9)^8}{ x^4}\right ]$.
Work Step by Step
The given expression is
$8\ln(x+9)-4\ln x$
Use power rule.
$\ln(x+9)^8-\ln x^4$
Use quotient rule.
$=\ln \left [\frac{(x+9)^8}{ x^4}\right ]$.
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