Use the principle: to write
the left side as a single logarithm:
Use the principle: to put in the understood
logarithm base:
Use the principle that the logarithm equation is equivalent
to the exponential equation to rewrite the above logatithm
equation as an exponential equation:
Substitute a=1, b=16, and c=-999972 in the quadratic formula:
We discard the negative answer since logarithms of negative
numbers are not real. So the only solution is
That's approximately 992.0179998
Edwin
