计算:(1)根号8+根号8分之1 (2)根号0.2-根号5 化简:(3)3根号2X-5根号8X (4)根号X+根号X三次

2024-11-27 22:32:31
推荐回答(2个)
回答(1):

(1)根号8+根号8分之1 =2根号2+1/(2根号2)=2根号2+(根号2)/4=1又1/4(根号2)

(2)根号0.2-根号5=1/根号5-根号5=根号5/5-根号5=-4/5(根号5)

(3)3根号2X-5根号8X =3根号(2x)-10根号(2x)=-7根号(2x)

(4)根号X+根号X三次方 =根号x+x根号x=(1+x)根号x

(5)2分之1根号ab-根号ab=-1/2根号(ab)

6根号3减根号0.12 =6根号3-0.2根号3=5又4/5(根号3)

根号24+(3根号6分之1减根号2又2分之3)=2根号6+(3*1/6根号6-1/3)根号24
=2根号6+(1/2根号6-2/3根号6)=2根号6-1/36号6=1又5/6根号6

根号20减(2根号0.2减根号3又5分之1)=2根号5-[2*1/5根号5-根号(16/5)]
=2根号5-[2/5根号5-4/5根号5]=2根号5+2/5根号5=2有2/5根号5

根号48减4根号3分之1)减(3根号3分之1减4根号0.5)
=(4根号3-4/3根号3)-(3*1/3根号3-4*1/2根号2)
=2又2/3根号3-根号3+2根号2
=1又2/3根号3+2根号2

回答(2):

(1)根号8+根号8分之1=2又4分之1根号2

(2)根号0.2-根号5=-5分之4根号5

(3)3根号2X-5根号8X=-7根号2X

(4)根号X+根号X三次方=(1+x)根号X

(5)2分之1根号ab-根号ab=-2分之1根号ab