Phân tích đa thức 3x(x – 3y) + 9y(3y – x) thành nhân tử ta được

A. 3xy(4x² – 2 + y)

B. 3xy(4x² – 3 + y)

C. 3xy(4x² + 2 + y)

D. 3xy(4x² – 2 + 3y)

A. (x – 1)³ + 2(x – 1)² = (x – 1)²(x + 1)

B. (x – 1)³ + 2(x – 1) = (x – 1)[(x – 1)² + 2]

C. (x – 1)³ + 2(x – 1)² = (x – 1)[(x – 1)² + 2x – 2]

D. (x – 1)³ + 2(x – 1)² = (x – 1)(x + 3)

A. (x – 2)² – (2 – x)³ = (x – 2)²(x – 1)

B. (x – 2)² – (2 – x) = (x – 2)(x – 1)

C. (x – 2)³ – (2 – x)² = (x – 2)²(3 – x)

D. (x – 2)² + x – 2 = (x – 2)(x – 1)

A. 5x(x – y) – (y – x) = (x – y)(5x + 1)

B. 5x(x – y) – (y – x) = 5x(x – y)

C. 5x(x – y) – (y – x) = (x – y)(5x – 1)

D. 5x(x – y) – (y – x) = (x + y)(5x – 1)

A. 4x³y² – 8x²y³ = 4x²y(xy – 2y²)

B. 4x³y² – 8x²y³ = 4x²y²(x – y)

C. 4x³y² – 8x²y³ = 4x²y²(x – 2y)

D. 4x³y² – 8x²y³ = 4xy²(x – 2y)

A. x²(x + 12)

B. x(x² + 12)

C. x(x² – 12)

D. x²(x – 12)