Write as a Single Logarithm log base b of 9- log base b of 9

$\log_{b} (9) - \log_{b} (9)$

Use the quotient property of logarithms, $\log_{b} (x) - \log_{b} (y) = \log_{b} (\frac{x}{y})$ .

$\log_{b} (\frac{9}{9})$