化简求职:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²,其中x=1,y=-1,z=1
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化简求职:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²,其中x=1,y=-1,z=1
化简求职:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²
化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²
化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²,其中x=1,y=-1,z=1
化简求职:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²,其中x=1,y=-1,z=1
(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²
=-(2x-y+3z)(2x+y+3z)-(x+2y-3z)²
=-[(2x+3z)²-y²]-(x+2y)²+6z(x+2y)-9z²
=-4x²-12xz-9z²+y²-x²-4xy-4y²+6xz+12yz-9z²
=-5x²-3y²-18z²-6xz+12yz-4xy
化简求职:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)²,其中x=1,y=-1,z=1
化简下列式子-(7X-Y-2Z)-{[4X-(X-Y-Z)-3X+Z]-X}
因式分解(x+y-z)*[(x+y)^2+(x+y)*z+z^2]怎么化简
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试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
2(x+y)(x+y-z)+3(y-z)(x+y-z)
x=3/2 y=-2 化简x-2(1/4x-1/3y²)+(-3/2x+1/3y²),在求职
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(x-3y+2z)(x+3y-2z)
(x-2y+3z)(x+2y-3z)
(2y-x-3z)(-x-2y-3z)
(x-2y+z)(-x+2y+z)
x+2y-z)(x+2y-z)