①根号5+2倍根号2-(根号5-根号2)
=3倍根号2
②|1-根号2|+|1+根号2|
=2倍根号2
③|根号3-根号5|+3(根号3-根号5)
=2根号3
④3(根号2+根号3)+3(根号2-2倍根号3)
=6倍根号2-3倍根号3能把过程写清楚些吗??①根号5+2倍根号2-(根号5-根号2)=根号5+2倍根号2-根号5+根号2=3倍根号2②|1-根号2|+|1+根号2|=-1+根号2+1+根号2=2倍根号2③|根号3-根号5|+3(根号3-根号5)=-根号3+根号5+3根号3-3根号5=2根号3-2根号5=2(根号3-根号5)④3(根号2+根号3)+3(根号2-2倍根号3)=3根号2+3根号3+3根号2-6倍根号3=6倍根号2-3倍根号3