1(根号27-2根号18)除以根号6 (2)根号32-5根号2分之1+6根号8分之1 (3)(根号3分之4-2根号3)x(-根号6
问题描述:
1(根号27-2根号18)除以根号6 (2)根号32-5根号2分之1+6根号8分之1 (3)(根号3分之4-2根号3)x(-根号6
(4) (2根号2-3根号3)(3根号3-2根号2)
答
(1) (根号27-2根号18)除以根号6
=根号(9/2)-2根号3
=3/2*根号-2根号3
(2)根号32-5根号2分之1+6根号8分之1
=4根号2-5/2*根号2+3/2*根号2
=3根号2
(3)(根号3分之4-2根号3)x(-根号6)
=-根号8+2根号18
=6根号2-2根号2
=4根号2
(4) (2根号2-3根号3)(3根号3-2根号2)
=-(3根号3-2根号2)平方
=-(27+8-12根号6)
=12根号6-35