若丨2x+y丨+(3x-4y-22)²=0,则x=(),y=(). 求帮忙 急啊
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知X²+3XY-4Y²=0(Y≠0)求X-Y/X+Y
已知2x+3y=2(x>0,y>0),求x+y最大值
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
急:已知集合A={(x,y)|2x-y=0},B={(x,y)|3x+y=0},C={(x,y)|2x-y=3} 求A∩
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy