x^2+3xy+y^2+2x+2y=82x^2+2y^2+3x+3y=14而且要说清楚!
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x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
(-x+2y)(2x+y)-(2x+y)(y-2x)-3xy=?因式分解
x+y=-3 xy+x+y=-2 x/y+y/x=?
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
f(xy,x-y)=x^2+3xy+y^2,则f(x,y)=?
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思,是3x-2xy-3y/x-2xy-y
(-3x^y+2xy)-( )=4x^+xy
(x^3-2x^2+xy^2)/(x-y)+(x+y)(y-x)=?
X^Y-2XY^2+y^3
x-y/xy=( )/x^3y^2
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
(-x-y)(x^2+xy+y^2)
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+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出,
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
当x-y=2xy时,求4x-3xy-4y/xy
已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.