1.若(x+y)^5-x^5+y=0,则y=0,1
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若x,y互为相反数(y≠0),则2x+5+2y+3x/y=____
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(3X+2Y-1)²+绝对值【3Y-2X-5】=0则X+Y=( )
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*
若4x-5y=0,则x+y分之x-y的值是
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
若4x=5y(y不等于0)则y²分之x²-y²=多少
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
.先化简再求值:(2x+y)(2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0