因式分解(1)3x^2+6xy (2)2x(x-y)+x^2(y-x) (3)x^3y-2x^2y^2+x^y (4)a^2+16b^2+8ab

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因式分解(1)3x^2+6xy(2)2x(x-y)+x^2(y-x)(3)x^3y-2x^2y^2+x^y(4)a^2+16b^2+8ab因式分解(1)3x^2+6xy(2)2x(x-y)+x^2(y

因式分解(1)3x^2+6xy (2)2x(x-y)+x^2(y-x) (3)x^3y-2x^2y^2+x^y (4)a^2+16b^2+8ab
因式分解(1)3x^2+6xy (2)2x(x-y)+x^2(y-x) (3)x^3y-2x^2y^2+x^y (4)a^2+16b^2+8ab

因式分解(1)3x^2+6xy (2)2x(x-y)+x^2(y-x) (3)x^3y-2x^2y^2+x^y (4)a^2+16b^2+8ab
1、3x(x+2y)
2 、 -x(x-2)(x-y)
3、题目有问题
4、（a+4b）^2

(1)
3x^2+6xy
=3x(x+2y)
(2)
2x(x-y)+x^2(y-x)
=2x(x-y)-x^2(x-y)
=(x-y)(2x-x^2)
=x(x-y)(2-x)
(3)
x^3y-2x^2y^2+xy^3
=xy(x^2-2xy+y^2)
=xy(x-y)^2
(4)
a^2+16b^2+8ab
=(a+4b)^2

(1)3x^2+6xy=3X(X+2y)
(2)2x(x-y)+x^2(y-x)= (x-y)(2x-x^2)=x(x-y)(2-x)
(3)x^3y-2x^2y^2+x^y =题目有错
(4)a^2+16b^2+8ab=(a+4b)^2

1) 3x ( x + 2y)
2) x(2-x)(x-y)
3)
4) (a + 4b)^2

（1）3x^2+6xy＝3x(x－y)
（2）2x(x-y)+x^2(y-x)＝2x(x-y)-x^2(x-y)＝x(x-y)(2-x)
（3）x^3y-2x^2y^2+x^y＝x(x^2y-2xy^2+恕我无能！)
（4）a^2+16b^2+8ab＝(a+4b)^2

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