3x3-3x2-y2+5y+x2-5y+y2 0.0 求亲们帮帮忙

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3x3-3x2-y2+5y+x2-5y+y20.0求亲们帮帮忙3x3-3x2-y2+5y+x2-5y+y20.0求亲们帮帮忙3x3-3x2-y2+5y+x2-5y+y20.0求亲们帮帮忙3x3-3x2

3x3-3x2-y2+5y+x2-5y+y2 0.0 求亲们帮帮忙
3x3-3x2-y2+5y+x2-5y+y2 0.0 求亲们帮帮忙

3x3-3x2-y2+5y+x2-5y+y2 0.0 求亲们帮帮忙
3x3-3x2-y2+5y+x2-5y+y2
=3x3+(x2-3x2)+(y2-y2)+(5y-5y)
=3x3-2x2

(4x2-4xy+y2)+(x2-2x+1)=0
(2x-y)2+(x-1)2=0
平方相加为0则都等于0
所以2x-y=0,x-1=0
x=1,y=2x=2
x-y=-1
所以(x-y)的2006次方=1