计算[(根2)-1][(根2)+1]^2的结果是?
计算[(根2)-1][(根2)+1]^2的结果是?
参考答案:[(根2)-1][(根2)+1]^2
=[(根2)-1][(根2)+1][(根2)+1]
=〔(根2)^2-1^2〕[(根2)+1]
=[2-1][(根2)+1]
=(根2)+1
计算[(根2)-1][(根2)+1]^2的结果是?
参考答案:[(根2)-1][(根2)+1]^2
=[(根2)-1][(根2)+1][(根2)+1]
=〔(根2)^2-1^2〕[(根2)+1]
=[2-1][(根2)+1]
=(根2)+1