化简(-2x-1/4y+2z)²

化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(x-2z+y)(y+z-2x)+(x 化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(xy-2z)(y+z-2x)+(x- 若3x-2y-z=0,x+4y-3z=0,求3x²+y²/4x²-y²+z
1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值. x^2+y^2+z^2+4x+4y+4z+1=0,求x+y+z x^2+y^2+z^2+4x+4y+4z+1=0求x+y+z x^2+y^2+z^2+4x+4y+4z+1=0 求x+y+z x+y+z=2 4x+2y+z=4 2x+3y+z=1 {x+2y+z=4,x+y+2z=-1,2x+y+z=1 设x、y、z为整数,证明:x^4*(y-z)+y^4*(z-x)+z^4*(x-y)/(y+z)^2+(z+x)^2+( 已知x²+y²+z²-2x+4y-6z+14=0,求x+y-z/x+y+z的值 已知x,y,z满足x+y+2z=1,x²+y²+6z+1.5=0,求x,y,z的值