计算(-2x+3y-5z)(2x-3y+5z)和(2x-3y-5z)(2x+3y-5z)拜托过程写详细点我要弄懂
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2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算
计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)
计算:3x-2y- [-4x+(z+3y)]
若|x-2|+|Y+3|+|z-5|=O计算求|x|+|Y|+|z|的值
若|x-2|+|y+3|+|z-5|=0.计算x.y.z的值
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
补充习题 9.计算{x-2y+3z}{x+2y-3z}计算{x-2y+3z}{x+2y-3z}
x/2=y/3=z/5 x+3y-z/x-3y+z
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x:y=3:2 y:z=5:4 x+y+z=66 请教结果及计算过程
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计算①(2x+y-3z)²;②y(x+y)+(x-y)²-x²-2y².