Đa thức x² + x – 2ax – 2a được phân tích thành

A. (5x – 2y)(x + 4y)

B. (5x + 4)(x – 2y)

C. (x + 2y)(5x – 4) 

D. (5x – 4)(x – 2y)

A. a²(a + b)(a + 1)

B. a(a + b)(a + 1)

C. (a² + ab)(a + 1)  

D. (a + b)(a + 1)

A. (a² + b)(5x – 2y)

B. (a² – b)(2x – 5y)

C. (a² + b)(2x + 5y)

D. (a² + b)(2x – 5y)

A. (x + 1)

B. (x + a)

C. (x + 2)

D. (x – 1)

A. x³ – 4x² – 9x + 36 = (x + 3)(x – 2)(x + 2)

B. x³ – 4x² – 9x + 36 = (x – 3)(x + 3)(x – 4)

C. x³ – 4x² – 9x + 36 = (x – 9)(x – 2)(x + 2)

D. x³ – 4x² – 9x + 36 = (x – 3)(x + 3)(x – 2)

A. (x + y + 2xy)

B. (x – y + 2xy)

C. (x – y + xy)

D. (x – y + 3xy)