题目

把代数式3x3-6x2y+3xy2因式分解,结果正确的是(　　) A.x(3x+y)(x-3y) B.3x(x2-2xy+y2) C.x(3x-y)2 D.3x(x-y)2 答案：D.3x3-6x2y+3xy2=3x(x2-2xy+y2) =3x(x-y)2.

数学试题推荐