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问题描述:

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1.若(x+2) ² = 2则x的值为 A√2 + 4 ,B√2 - 4 C±√2 - 2 D√2± 2(根号有空格哦)
2.a,b两数满足b

1选C
2选C a-b>0
3-m>0即m<0则n<0即P位于第四象限
4 相反数3-2√2;2√2 - 3<0故绝对值为3-2√2
5展开(x-y)²/xy =x/y+y/x-2=√6/3+√6/2-2=5√6/6-2
6等于π-3=0.1416