若3x-4y=0,则x/y=___,﹙x-y﹚/y=___.
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知实数x,y满足2x-3y=4,并且x≥0,y≤1,则x-y的最大值是_,最小值是_
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
若|2x-y+5|+(x+2y-4)的平方=0,则(2x-y)的三次方-(x-3y)(y-2x)的平方
因式分解 x²(x+y)²-x²y²=__
若3X-4Y=0,则Y分之X等于多少,Y分之X-Y=多少
若3x=4y,则x:y等于
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*