(3X 3 ).(-3X 2 + 7X - 2) BẰNG

Câu 1: (3x 3 ).(-3x 2 + 7x - 2) bằng:

A. -9x 5 + 21x 4 - 6x 3 B. 9x 5 + 21x 4 + 6x 3

C. 9x 5 + 21x 4 - 6x 3 D. -9x 6 + 21x 4 - 6x 3