6x-8y=0 x:y

已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y) 已知x²+y²-8x+6y+25=0,求（x-y+4xy/x-y）（x+y-4xy/x+y） 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x²+y²+6x-8x+25=0,求（x/x²-y² - 1/x+y）÷y/y-x {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 6x-8y=0 x:y x²+y²-6x-8y+25=0 求y/x-x/y=? 已知x平方+y平方+6x-8y+25=0,求y/x+x/y-2的值. 已知x^2+y^2-6x-8y+25=0,求分式y/x - x/y的值 已知x^2+y^2-6x-8y+25=0 求y/x-x/y的值 已知x,y满足x^2+y^2-6x+8y+25=0,求y^x的值 已知x²+y²+8x+6y+25=0,求x-4y/x+y的值 若x^2+y^2-6x+8y+25=0 则y/x-x/y的值是