Expand the logarithmic expression.

log subscript b baseline Start Root Start Fraction 13 over 73 End Fraction End Root
work out

To expand the logarithmic expression, we need to rewrite it in exponential form.

The given logarithmic expression is:
log_b (√(13/73))

This can be rewritten as:
b^log_b (√(13/73))

Since the base of the logarithm is b, the expression simplifies to:
√(13/73).