3m-3n per n-m tolong jawabb

(3m-3n) / (n-m)
= (3m-3n) × (n+m) / (n-m) × (n+m)
= (3mn-3n^2+3m^2-3mn) / (n^2-m^2)
= (-3n^2+3m^2) / (n^2-m^2)
= -3(n^2-m^2) / (n^2-m^2)
= -3


^=pangkat

[tex] \frac{3m-3n}{n-m} [/tex]
[tex] = \frac{-3(n-m)}{n-m} [/tex]
[tex] = -3 [/tex]