Question

Use the definition of a logarithm to solve the equation. ln ( − 5 z ) = ln ( z ^2 − 7 z )

Answer 1

Explanation:

From the property of logarithm the input cannot be negative.

Therefore Z should be negative

As from the given question both sides have the (ln)
operator thus we can remove it.

-5Z=z^2-7Z

2Z=Z^2

Z^2=2Z

Z=2