Question 201276
taking the antilog ___ x (x-15) = 100


distributing and subtracting 100 ___ x^2 - 15x - 100 = 0


factoring ___ (x - 20) (x + 5) = 0


x - 20 = 0 ___ x = 20


x + 5 = 0 ___ x = -5


since logs are not defined for negative arguments (-5); x = 20