若(x+y)^2=10,(x-y)^2=6,求x^2+y^2及xy的值

若(x+y)^2=10,(x-y)^2=6,求x^2+y^2及xy的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 如果x^2+xy+y-14,y^@+xy+x=28,求x+y的值. x^2-2xy+y^2+6y+10=0求x,y的值. 若x+y=5,xy=6,求x^2y+xy^2的值 若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值. 已知x+y=17,xy=60,求x^2+y^2及(x-y)^2的值 已知xy=2,x-y=3,求（x+y）（x-y）-y^2-（6x^2y-2xy^2)/2y的值. 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值 已知xy=-2,x-y=3,求(x+y)(x-y)-y平方+(x-y)平方-（6x2y-2xy平方）/2y的值