Question

lg x=lg(m+r)+lg(m^2−mr+r^2)

Answer 1

lgx= lg( m+ r)(m^2- mr+ r^2)
x=( m+ r)( m^2- mr+r^2)
x=m^3- r^3

Answer 2

x>0 m^3-r^3>0 m^3> r^3 m> r

Answer 3

x>0 m^3-r^3>0 m^3> r^3 m>r