6(x+y)²+|x-2y=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.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)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x²+4y²-6x+8y+13=0,求x-y/x+y的值.
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知x+3y=0,求x³+3x²y-2x-6y的值.
已知x^2-2x+y^2+6y+10=0,求分式x-y/x+y的值
X^2+y^2-2x+6y+10=0,求x+y的值
已知x^2+y^2-6x-8y+25=0,求分式y/x - x/y的值
已知x^2+y^2-6x-8y+25=0 求y/x-x/y的值
已知x,y满足x^2+y^2-6x+8y+25=0,求y^x的值
已知:4x^2+y^2-4x-6y+10=0,求y/x-x/y的值