已知(X-Y)^2=625/36,X+Y=7/6,求XY的值
已知(X-Y)^2=625/36,X+Y=7/6,求XY的值
已知(x-y)^2=625/36,x+y=7/6,分别求x^2-y^2,x^2+y^2,xy的值.
已知(x+y)(x+y)=625/36 x-y=7/6 求xy的值?
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y)的值
已知xy²=-6,求xy(x^3y^7-3x^2y^5-11.5y)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)的2次方=625/36,x+y=7/6,求xy的值
已知x-xy=8,xy-y=-9,求x+y-2xy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xy=-2,x-y=3,求(x+y)(x-y)-y平方+(x-y)平方-(6x2y-2xy平方)/2y的值
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+x(xy+y)的值