若(3x-y+5)²+√2x-y+3=0,求x-y的值
若(3x-y+5)²+√2x-y+3=0,求x-y的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+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/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
|x+y+2|+(2x+3y+5)²=0 求x y的值.
若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?
已知(x-2y)²+√(2x-3y-3)=0,求x+y的值.
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.