已知丨x-y+5丨+(x+3)²=0,则3x+2y=?
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知丨x-y+5丨+(x+3)²=0,则3x+2y=?
已知(x+3)+丨X-y+10丨=0 ,求5x²y-[2x²y-(3xy-xy²)-3x&
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
已知丨3x+y-5丨+丨x-2y-4丨=0 求x,y的值
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知:丨2x+y-3丨+根号下(x-3y-5)²=0,则x²=?
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-5y=0(y≠0),则代数式2x-3y/3x+6y
已知x²+4x+y²-2y+5=0,则x+y=
已知x,y>0 2x+y+3=xy 求5x+4y最小值