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

\(=9x^2\left(3x-1\right)-6x\left(3x-1\right)+4\left(3x-1\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

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

\(=9x^2\left(3x-1\right)-6x\left(3x-1\right)+4\left(3x-1\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

\(27x^3-27x^2+18x-4\)

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

\(=\left(27x^3-9x^2\right)-\left(18x^2-6x\right)+\left(12x-4\right)\)

\(=9x^2.\left(3x-1\right)-6x\left(3x-1\right)+4\left(3x-1\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

\(27x^3-27x^2+18x-4\)

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

\(=3x\left(9x^2-6x+4\right)-\left(9x^2-6x+4\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

27x³ - 27x² + 18x - 4

= 27x³ - 9x² - 18x² + 6x + 12x - 4

= 9x² ( 3x - 1 ) - 6x ( 3x - 1 ) + 4 ( 3x - 1 )

= ( 9x² - 6x + 4 ) ( 3x - 1 )

\(27x^3-27x^2+18x-4\)

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

\(=3x\left(9x^2-6x+4\right)-\left(9x^2-6x+4\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

con dồ ngu si

a) \(2x^3-x^2+5x+3\)

\(=2x^3-2x^2+x^2+6x-x+3\)

\(=\left(2x^3-2x^2+6x\right)+\left(x^2-x+3\right)\)

\(=2x\left(x^2-x+3\right)+\left(x^2-x+3\right)\)

\(=\left(2x+1\right)\left(x^2-x+3\right)\)

b)  \(27x^3-27x^2+18x-4\)

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

\(=\left(27x^3-18x^2+12x\right)-\left(9x^2-6x+4\right)\)

\(=3x\left(9x^2-6x+4\right)-\left(9x^2-6x+4\right)\)

\(=\left(3x-1\right)\left(9x^2-6x+4\right)\)

\(27x^3+27x^2+18x+4=\left(27x^3+18x^2+12x\right)+\left(9x^2+6x+4\right)\)

\(=3x\left(9x^2+6x+4\right)+\left(9x^2+6x+4\right)\)

\(=\left(3x+1\right)\left(9x^2+6x+4\right)\)

\(\left(3x-1\right)\left(9x^2-6x+4\right)\)

Phân tích thành nhân tử :

\(\left(3x+1\right)\left(9x^2-6x+4\right)\)

Thế đó bạn

27x³ - 27x² + 9x + 1 + x + 1/3 

= ( 3x + 1 )³ + 1/3 ( 3x + 1 )

= ( 3x + 1 ) [ ( 3x + 1 ) ² + 1/3 ]

= ( 3x + 1 ) ( 9x² + 6x + 4/3 )

Nếu thế how to phân tích cái 2x^2 =)))) đề sai 

2x^2 phân tích như thế nào để đặt nhân tử chung hoặc nhóm hạng tử đây???? Xem lại đề bạn ơi