x+y=4 xy=3则x^2+y^2
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x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
f(xy,x-y)=x^2+3xy+y^2,则f(x,y)=?
(-3x^y+2xy)-( )=4x^+xy
若|x-3|+(y+2)=0,则(x-y+4xy/x-y)(x+y-4xy/x+y)的值是
若|x-3|+(y+2)²=0,则(x-y+4xy/x-y)(x+y-4xy/x+y)的值是
已知x/y=3/4 ,则3xy-2y/2x+4xy=?
已知x-y=8 xy=7,则3xy-2x+2y+4(y-x)²=?
已知2/x-1/y=3,则(2y-x+4xy)/(3x-6y-5xy)=?
已知x-y=-3,xy=2则3x-5y-(x-3y-4xy)是多少
已知1/X-1/Y=5 ,则x-2xy-y/4x+3xy-4y
x^2-4xy+3y^2=(x-3y)(x-y)x^2-4xy+3y^2 怎么分解成(x-3y)(x-y)
当x-y=2xy时,求4x-3xy-4y/xy
已知x+xy+y=3,则(3x+2xy+3y)/(2x+xy+2y)=
已知x-y=3xy,则2x+3xy-2y除以x-2xy-y=?
已知x-y=3xy,则2x+3xy-2y/x-2xy-y=
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之