已知(X-1)²+(|Y|-2)²+|X+Z-3|=0,则X+Y+Z的值?
人气：342 ℃ 时间：2020-04-09 12:22:47
解答
每项做出来都是正数,因为结果为0,所以每一项计算结果都为0
得出 x=1 y=2或者-2 z=2
x+y+z=5或者1
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