因式分解(a-b)^3-2ab(a-b)6x(a-1)^3-8x(1-a)^31/2(a+b)^2-8a^2b^217(x-y)^2-68a^2(y-x)^2-4(x-2y)^2+9(3y-x)^2

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因式分解(a-b)^3-2ab(a-b)6x(a-1)^3-8x(1-a)^31/2(a+b)^2-8a^2b^217(x-y)^2-68a^2(y-x)^2-4(x-2y)^2+9(3y-x)^2

因式分解(a-b)^3-2ab(a-b)6x(a-1)^3-8x(1-a)^31/2(a+b)^2-8a^2b^217(x-y)^2-68a^2(y-x)^2-4(x-2y)^2+9(3y-x)^2
因式分解(a-b)^3-2ab(a-b)
6x(a-1)^3-8x(1-a)^3
1/2(a+b)^2-8a^2b^2
17(x-y)^2-68a^2(y-x)^2
-4(x-2y)^2+9(3y-x)^2

因式分解(a-b)^3-2ab(a-b)6x(a-1)^3-8x(1-a)^31/2(a+b)^2-8a^2b^217(x-y)^2-68a^2(y-x)^2-4(x-2y)^2+9(3y-x)^2
( a - b )"' - 2ab( a - b )
= ( a - b )( a" - 2ab + b" - 2ab )
= ( a - b )( a" - 4ab + b" )
6x( a - 1 )"' - 8x( 1 - a )"'
= 6x( a - 1 )"' + 8x( a - 1 )"'
= ( 6x + 8x )( a - 1 )"'
= 14x( a - 1 )"'
(1/2)( a + b )" - 8a"b"
= ( 1/2 )[ ( a + b )" - 16a"b" ]
= ( 1/2 )( a + b + 4ab )( a + b - 4ab )
17( x - y )" - 68a"( y - x )"
= 17[ ( x - y )" - 4a"( x - y )" ]
= 17( 1 - 4a" )( x - y )"
= 17( 1 + 2a )( 1 - 2a )( x - y )"
-4( x - 2y )" + 9( 3y - x )"
= 3"( x - 3y )" - 2"( x - 2y )"
= ( 3x - 9y + 2x - 4y )( 3x - 9y - 2x + 4y )
= ( 5x - 13y )( x - 5y )