求一下答案！！！过程也要的！！！因式分解！

1. 4X(2X-Y)+2Y(Y-2X)

2. 21（a-b)^3-35(b-a)^2

3. 4a(x+y-z)+10a^2(z-x-y)

4. (2a+b)(2a-3b)+a(2a+b)

5. 6(x-y)^3+15(y-x)^2-9(y-x)^3

1. 4X(2X-Y)+2Y(Y-2X)

=8x²-4xy+2y²-4xy

=8x²-8xy+2y²

=2(4x²-4xy+y²)

=2(2x-y)²

2、21（a-b)³-35(b-a)²

=21(a-b)³-35(a-b)²

=7(a-b)²[3(a-b)-5]

=7(a-b)²(3a-3b-5)

3、4a(x+y-z)+10a²(z-x-y)

=2a(2x+2y-2z+5az-5ax-5ay)

4、(2a+b)(2a-3b)+a(2a+b)

=(2a+b)(2a-3b+a)

=3(2a+b)(a-b)

5、6(x-y)³+15(y-x)²-9(y-x)³

=6(x-y)³+15(x-y)²+9(x-y)³

=3(x-y)²[2(x-y)+5+3(x-y)]

=15(x-y)²(x-y+1)

1. 4X(2X-Y)+2Y(Y-2X)

=（2x-y)(4x-2y)

=2(2x-y)(2x-y)

2. 21（a-b)^3-35(b-a)^2

=7(a-b)^2{3（a-b)-5)

=7(a-b)^2(3a-3b-5)

3. 4a(x+y-z)+10a^2(z-x-y)

=2a(x+y-z)(2-5a)

4. (2a+b)(2a-3b)+a(2a+b)

=(2a+b)(2a-3b+a)

=(2a+b)(3a-3b)

=3(2a+b)(a-b)

5. 6(x-y)^3+15(y-x)^2-9(y-x)^3

=3(x-y)^2{2(x-y)+5-3(y-x)}

=3(x-y)^2(5x-5y+5)

=15(x-y)^2(x-y+1)

1. 4X(2X-Y)+2Y(Y-2X)=4X(2X-Y)-2Y(2X-Y)=(2X-Y)(4x-2Y)=2(2x-y)(2x-y)=2(2x-y)^2

2. 21（a-b)^3-35(b-a)^2=21（a-b)^3-35(a-b)^2=7(a-b)^2[3(a-b)-5]=7(a-b)^2(3a-3b-5)

3. 4a(x+y-z)+10a^2(z-x-y)=4a(x+y-z)-10a^2(x+y-z)=2a(x+y-z)(2-5a)

4. (2a+b)(2a-3b)+a(2a+b)=(2a+b)(2a-3b+a)=(2a+b)(3a-3b)=3(2a+b)(a-b)

5. 6(x-y)^3+15(y-x)^2-9(y-x)^3= 6(x-y)^3+15(x-y)^2+9(x-y)^3=3(x-y)^2[2(x-y)+5+3(x-y)]

=3(x-y)^2(2x-2y+5+3x-3y)=3(x-y)^2(5x-5y+5)=15(x-y)^2(x-y+1)