(2-根2)²-2根2(2-根2)+2怎么做?
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(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