X*256+Y*265+Z*274+29*5=7894X=5 求Y.Z
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X*256+Y*265+Z*274+29*5=7894X=5 求Y.Z
x-y/(z-x)(z-y) 一y-z/(x-y)(x-z) +z-x/(y-z)(y-x)
x^-(y-z)^/(x+y)^-z^
计算(x+y-z)(x-y-z)
计算:(x-y+z)(-x+y+z)
(x+y-z)(x-y+z)=
x y y ...y z x y ...y z z x ...y ........z z z ...x 求解行列式.
已知x+y=27,y+z=32,x+z=29那么x,y,z各等于几?已知x+y=27,y+z=32,x+z=29 那么x= y= z=
x,y,z满足x+y+z=3,x^2+y^2+z^2=29,x^3+y^3+z^3=45,求x,y,z,x^4+y^4+z^4等于几
x/10=y/5=z/7 x+y+2z=29 求x y z
x+y>z 0
用乘法公式计算(x+y)(x-y)+(-y-z)(-y+z)+(-x+z)(z+x)
计算:(X+y+z)(-x+y+z)(x-y+z)(x+y-z)
(x+y-z)(x-y+z)-(x+y+z)(x-y-z)
因式分解 :(x+y-z)(x-y-z)+(y-x+z)(y-x-z)
因式分解测试题x(x+y-z)+y(x+y-z)+z(z-x-y)
(x+y+z)(-x+y+z)(x-y+z)(x+y-z)等于什么?
(x-y+z)²