若x^2+9y^2-2x+24y+17=0,求x^2与y^-2

若x^2+9y^2-2x+24y+17=0,求x^2与y^2 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y* (3x+2y)+(5x-y)i=17-2i.求x与y 已知4x=9y求(1)x+y/y (2)y-x/2x 已知方程组{2x+y=6 x+2y=9},求x+y与x-y的值 若|x+2y-1|+y²+4y+4=0,求（2x-y）²-2（2x-y)(x+2y)+(x+2y)& 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x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 若|x+y-1|+（x-y-2)²=0,求代数式（x+2y)(x-2y）-（2x-y)(-y-2x)的值. 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 已知2/x+2/y=根号24,求 x/y(x-y) - y/x(x-y)的值