2x²+1/2y²-2x-3y+5=0,求(2x√9x-y²√x/y³)-(√1
2x²+1/2y²-2x-3y+5=0,求(2x√9x-y²√x/y³)-(√1
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知4x²+y²-4x-6y+10=0,求(2/3√9x+y²√x/y³)-(x
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
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[(2/3)x√(9x)+y²√(x/y
已知x²+y²+5=2x+4y,求代数式(2x²-(x+y)(x-y))x((x+y-1)
已知4x²+y²-4x-6y+10=0,求(2/3√9x +y²√x/y³)-(
若实数x,y满足x的平方+2√3x+根号(x+y+1)+3=0,求代数式(1/x-y+1/x+y)÷y/(x²
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²