(2x+y)^2-4x-2y-3=0怎么化简
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4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
x^2-4xy+3y^2=(x-3y)(x-y)x^2-4xy+3y^2 怎么分解成(x-3y)(x-y)
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
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(x+y)(x-y)+3y^2怎么做?
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(X-Y)^2-4(X-Y)+3怎么做,
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
x*x+2x+y*y-4y+5=0 x= y=
2(x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15
{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1