I dont know how to get this question
The mining engineer, Victoria, decides that a better site for the mine is the region bounded by the graph
of g and that of a new function k: (–8, a) ¿ R, k(x) = –loge(a – x), where a is a positive real number.
i. Find, in terms of a, the x-coordinates of the points of intersection of the graphs of g and k.
loge(x)= - loge(a-x)
The answer is x= a+-( (sqrt(a^2-4)/2)