若x^2+2x+1+y^2-8x+16=0,求x分之y的值

若x-y=1 化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 若x*x+y*y=x+y-1/2,求x,y的值如题 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若x+y=1,x不等于0则x+(2xy+y^2)/x/(x+y)/x= 3分之2(x-y)-4分之x+y=-1 8(x+y)-4(2x-y)=16 若√x-1-√1-x=(x+y)²先化简再求值：（1/2x）-(1/x+y)[x²-y²+(x+y/2x] 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 若x^2+2x+1+y^2-8x+16=0,求x分之y的值 [(2x-y)^2-y(y-4x)-8x]其中x=-1/2 16-8（x-y)+(x-y)2 x^+2x+1+y^2-8y+16=0求y/x 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 9y=3x-(x-1),4(x+y)-(2x+4)=8y [(2x+y)²-y(y+4x)-8x】/4x,其中x=-1,y=2005 急 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2)