(2-根2）²-2根2（2-根2）+2怎么做?

(2-根2）²-2根2（2-根2）+2怎么做?
(2-根2）²-2根2（2-根2）+2怎么做?

(2-根2）²-2根2（2-根2）+2怎么做?
(2-√2)²-2√2(2-√2)+2
=[(2-√2)-√2]²
=(2-2√2)²
=2²-8√2+(2√2)²
=12-8√2
请点击下面的【选为满意回答】按钮,

(2-根2）²-2根2（2-根2）+2
=【（2-√2）-√2】²
=（2-2√2）²

如果化简的话
=4-8√2++8
=12-8√2