因式分解:(1)4x3-xy2(2)-3x3+6x2y-3xy2(3)m3(a-2)+m(2-a)
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因式分解:
(1)4x3-xy2
(2)-3x3+6x2y-3xy2
(3)m3(a-2)+m(2-a)
(1)4x3-xy2
(2)-3x3+6x2y-3xy2
(3)m3(a-2)+m(2-a)
![因式分解:(1)4x3-xy2(2)-3x3+6x2y-3xy2(3)m3(a-2)+m(2-a)](/uploads/image/z/17803964-20-4.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%EF%BC%881%EF%BC%894x3-xy2%EF%BC%882%EF%BC%89-3x3%2B6x2y-3xy2%EF%BC%883%EF%BC%89m3%EF%BC%88a-2%EF%BC%89%2Bm%EF%BC%882-a%EF%BC%89)
(1)4x3-xy2
=x(4x2-y2)
=x(2x+y)(2x-y);
(2)-3x3+6x2y-3xy2
=-3x(x2-2xy+y2)
=-3x(x-y)2;
(3)m3(a-2)+m(2-a)
=m3(a-2)-m(a-2)
=m(a-2)(m2-1)
=m(a-2)(m+1)(m-1).
=x(4x2-y2)
=x(2x+y)(2x-y);
(2)-3x3+6x2y-3xy2
=-3x(x2-2xy+y2)
=-3x(x-y)2;
(3)m3(a-2)+m(2-a)
=m3(a-2)-m(a-2)
=m(a-2)(m2-1)
=m(a-2)(m+1)(m-1).
有这样一道题:“计算(2x3-3x2y-2xy2)-(x3-2xy2+y3)+(-x3+3x2y-y3)的值,其中x=1
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