How do you solve log- m+2 = 4 ? Precalculus Properties of Logarithmic Functions Logarithm-- Inverse of an Exponential Function 1 Answer Parabola Apr 19, 2018 #m=-100# Explanation: I am assuming that we have: #log(-m)+2=4# #=>log_10(-m)=2# Remember that: If #log_a(b)=c#, then #b=a^c# #=>-m=10^2# #=>-m=100# #=>m=-100# Answer link Related questions What is a logarithm? What are common mistakes students make with logarithms? How can a logarithmic equation be solved by graphing? How can I calculate a logarithm without a calculator? How can logarithms be used to solve exponential equations? How do logarithmic functions work? What is the logarithm of a negative number? What is the logarithm of zero? How do I find the logarithm #log_(1/4) 1/64#? How do I find the logarithm #log_(2/3)(8/27)#? See all questions in Logarithm-- Inverse of an Exponential Function Impact of this question 7543 views around the world You can reuse this answer Creative Commons License