丨3x+2y+3丨+(2x-4y-14)²=0,求x y的值.
丨3x+2y+3丨+(2x-4y-14)²=0,求x y的值.
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知丨3x+y-5丨+丨x-2y-4丨=0 求x,y的值
已知4x-2y=0,求x-y/3x+2y的值
丨x+2y+3丨+(2x+y)²=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2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
已知丨x+3|+|2x-y|=o求2(3x-2y)-4[3(x-y)-2(x-2y)]的值
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知x^2-4x+y^2-10y+29=0,求x^2y^2+2x^3y^2+x^4y^2的值
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
已知x-3y=0,求(x²-2xy+y²/x-y)-2y的值