问题
选择题
(-3x+1)(-2x)2等于( )
A.-6x3-2x2
B.6x3-2x2
C.6x3+2x2
D.-12x3+4x2
答案
(-3x+1)(-2x)2,
=(-3x+1)•(4x2),
=-12x3+4x2.
故选D.
(-3x+1)(-2x)2等于( )
A.-6x3-2x2
B.6x3-2x2
C.6x3+2x2
D.-12x3+4x2
(-3x+1)(-2x)2,
=(-3x+1)•(4x2),
=-12x3+4x2.
故选D.