已知2x-y=10,求[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y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2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
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
已知:4x^2+y^2-4x-6y+10=0,求y/x-x/y的值
已知x+y/y=11/8,求x-y/x+2y的值.
已知2x-y分之x+y=2,求代数式4x-2y分之x+y-4x+4y分之2x-y的值
已知(2x-y)/(x+y)=2,求代数式(4x-2y)/(x+y)-(4x+4y)/(2x-y)的值.
已知(2x-y)/(x+y)=2,求代数式(4x-2y)/(x+y)-(4x+4y)/(2x-y)的值
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
已知:X-Y\X+Y=4,求X-Y\2(X+Y)-4X+4Y\X-Y的值
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值