化简√5分之(√20+√5)-√(3分之1)·√12
如题,
人气:306 ℃ 时间:2020-04-09 03:35:25
解答
﹙√20+√5﹚/√5-√﹙1/3﹚×√12
=√4+1-√﹙1/3×12﹚
=2+1-2
=1.根号4+1怎么来的??﹙√20+√5﹚/√5=√20/√5+√5/√5=√4+1=2+1根号不会被约分掉吗,就是(根号20+根号5)除以根号5=根号20除以根号5+根号5除以根号5=4+1???√20/5+√5/5=√﹙20/5﹚+√﹙5/5﹚=√4+1.
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