已知x=3.2,y=6.8,则 x^2+2xy+y^2=?

已知x-y=4xy，则2x+3xy-2yx-2xy-y 已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 已知x+y=5,xy=2则x^2y+xy^2=( ) 已知x+y=1,xy=1/5,则x^2y=xy^2 已知x+y=6,xy=-3,则x^2y+xy^2=? 已知x+y=6,xy=-3,则x^2y+xy^2= 已知x+y=5,xy=-3,则x^2y+xy^2, 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值 已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方 已知x-xy=8,xy-y=-9,求x+y-2xy的值