求教 根号下36-4详解过程

根号下36-4
=根号下4(9-1)
=2根号下8
=2根号下(4*2)
=4根号下2

根号下36-4=6-4=2
根号下（36-4）=根号下32=4*根号下2约=5.656
根号下36.4
——6.03
）36.40
__36
_____40 00
1203_36 09
______3 91 00

根号下36-4
=根号下4(9-1)
=2根号下8
=2根号下(4*2)
=4根号下2
=4倍根号下2=4*1.414=5.656

=根号下32=4倍根号下2=4*1.414=5.656

=6-4=2