若√x-1+√(y+1)=0 求x²º¹³+y²º¹
2x²+1/2y²-2x-3y+5=0,求(2x√9x-y²√x/y³)-(√1
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.
若x²-y²=1且x>0,y>0,求x√(1+y²)-y√(x²-1)的值
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
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
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知x,y满足x²+y²-6x+2y+10=0求³√x²-y²的值
求函数y=√ ̄x²+x+1+(x-1)º的定义域
若x.y满足y=√1-3x+√(x-1)²+√3x-1,求x+y的平方根.
1、已知实数x、x满足x²+y²-xy+2x-y+1=0,试求x、y的值.
不解方程组{2x+Y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值.