若x,y,z适合x+y=6,z^2=xy-9,则的值是
若x,y,z适合x+y=6,z^2=xy-9,则的值是
若x-y=6,xy=-8,求代数式(x+y+z)²+(x-y-z)(x-y+z)-2·z(x+y)的值
若xyz适合x+y=6,z方=xy-9,则z=?
若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值?
已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值.
已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值
已知实数x,y,z适合x+y=6,z2=xy-9,则z=( )
若x/3=y/2=z/5,且xy+yz+zx=93,求9x*x+12y*y+2z*z的值.
若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值
已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z
实数的性质已知1/2*∣x-y∣+√(2y+z)+(z^2-z+1/4)=0,则z/(xy)的值是()
若:X^2-4X+Y+6Y+√ Z-3+13=0求(xy)^z的值