若x>=0,y>=0,2x+3y

若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 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*y)的值 (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___. 若根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x 若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求2x+2√x*√y+3y/x-√x*√y+y 若2x^2-3xy+2y^2=0,x>0,y>0,x+y/x-y 若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=? 若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2= 若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值? 若|x+y-3|+(x-y-5)^2=0,则x)^2-y^2= 若x+y+3=0,求2/3-2x-2y+(-x-y)^2 若|x|=2,|y|=3,且y/2+x《0则x+y 若[x-y+3]+|2x+y|=0,则x+y=? 若2x-3y=0,求5x+4y/3x-2y