若|³√y-2|+√2x+y²=0,求x+y的值
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
若(3x-y+5)²+√2x-y+3=0,求x-y的值
已知√x方-y +√2x+y=0,求x+y的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知(x-2y)²+√(2x-3y-3)=0,求x+y的值.
若x>0,y>0,且x-(√xy)-2y=0,求x/y的值
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+y)的值.
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
若正数x,y满足x²-y²=2xy,求(x-y)/(x+y)的值
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
已知x,y满足x²+y²-6x+2y+10=0求³√x²-y²的值