若(a一1)的2次方十|b十2|=0,那么a十b=
若(a一1)的2次方十|b十2|=0,那么a十b=
数学人气:186 ℃时间:2019-09-21 06:45:08
优质解答
-1是吗a=1,b=-2谢谢了平方≥0,绝对值≥0
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