Chọn kết quả sai
A. 4x(2x2 – 5x + 3) = 8x3 – 20x2 + 12x
B. 5x(3x2 – 6x – 1) = 15x3 – 30x2 – 5x
C. (–2x)( –3x2 + 4x –7) = –6x3 – 8x2 + 14x
D. (–3x)( –x2 – 3x – 4) = 3x3 + 9x2 + 12x
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