Question

(根号3a-根号27a的3次方）÷根号3分之a

Answer 1

(根号3a-根号27a的3次方）÷根号3分之a
=(根号3a-3根号3a的3次方）*a分之根号3
=根号3a*a分之根号3-3根号3a的3次方*a分之根号3
=3-9a的平方

Answer 2

(根号3a-根号27a的3次方）÷根号3分之a
=√3a÷a/3-√27a³÷a/3
=√9-√81a²
=3-9a