已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]÷2y
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
已知2x-y=2014,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y
已知2x-y=4022 求式子[(x的平方+y的平方)-(x-y)的平方+2y(x-y)]除4y的值
已知4x=9y求(1)x+y/y (2)y-x/2x
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知2/x+2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
已知2/x 2/y=根号24,求 x/y(x-y) - y/x(x-y)的值