Question

1/2 log[5]1-2 log[5]5

Answer 1

hint:
\[{\log _5}1 = 0\]

Answer 2

This is how far my daughter's gotten. Not sure if she's on the right track or not.

Answer 3

Here are the right steps:
\[\frac{1}{2}{\log _5}1 - 2{\log _5}5 = \frac{1}{2} \cdot 0 - 2 \cdot 1 = 0 - 2 = - 2\]