x²y-2x²-y+2 4x(x-y)²-12(x-y)³ 因式分解-x³+x²-4分之1x
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x²y-2x²-y+2 4x(x-y)²-12(x-y)³ 因式分解-x³+x²-4分之1x
x²y-2x²-y+2 4x(x-y)²-12(x-y)³ 因式分解
-x³+x²-4分之1x
x²y-2x²-y+2 4x(x-y)²-12(x-y)³ 因式分解-x³+x²-4分之1x
x"y - 2x" - y + 2
= x"( y - 2 ) - ( y - 2 )
= ( y - 2 )( x" - 1 )
= ( y - 2 )( x - 1 )( x + 1 )
4x( x - y )" - 12( x - y )"'
= 4( x - y )"[ x - 3( x - y ) ]
= 4( x - y )"( x - 3x + y )
= 4( x - y )"( -2x + y )
= -4( x - y )”( 2x - y )