Question

1)9x-27x^4 2)18y^5+12y^4 3)56a^10 b^6-32a^4 b^8 4)36mn^5+63m^2 n^6

Answer 1

9x(1-3x^3)
6y^4(3y+2)
8a^4b^6(7a^6-4n^2)
9mn^5(4+7mn)