计算:2+√2/2-√2-﹙1/√2-1+√2﹚=_____

问题描述:

计算:2+√2/2-√2-﹙1/√2-1+√2﹚=_____

2+√2/2-√2-﹙1/√2-1+√2﹚=3-2√2