根号下9减4根号2怎么化简
问题描述:
根号下9减4根号2怎么化简
答
=根号下(8-4根号2+1)
=根号下(2根号2-1)^2
=2根号2-1
根号下9减4根号2怎么化简
=根号下(8-4根号2+1)
=根号下(2根号2-1)^2
=2根号2-1