若(4x-3)²+|2y+1|=0,则x+2y=
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
若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若(1+X)²+Y+1的绝对值=0 则4x-3y分之2x-y等于?
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
若全集I={(x,y)|x,y∈R},集合M={(x,y)|(y-3)/(x-2)},N{(x,y)|y=x=1},则(
若x=-1/4,能否确定代数式(2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)的值?
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于