Question

phân tích 

27x³-27x²+18x-4

Answer 1

=27x^3 - 9x^2 - 18x^2 + 6x + 12x - 4 
= 9x^2.(3x -1) - 6x.(3x - 1) + 4.(x-3) 
= (3x-1).(9x^2 - 6x +4)