Question 32717
You did a great job with the start of the equations, you just need to keep going. 
First equation:  m^3-mn^2, you found the gcf and factored it, 
leaving: m(m^2 - n^2).  Now you need to factor (m^2 - n^2). It is the difference of perfect squares. It factors to (m + n)(m - n).
So, m^3-mn^2 factors to m(m + n)(m - n).
Next equation: mn^2 + m^2n - 2m^3.  You found the gcf and factored, 
leaving m(n^2 + mn - 2m2).  Look at only what is inside the parenthesis.  You need to factor that (do reverse foil).  You get (n - m)(n + 2m). Double check to make sure that when you do FOIL, it gives you (n^2 + mn - 2m2).  So, now 
mn^2 + m^2n - 2m^3 simplifies to m(n - m)(n + 2m).