√20.4√20.4
=2√5.4=2√5.4
=(2.4)√5=(2.4)√5
=8√5=8√5
⇒8√5=4√20⇒8√5=4√20
⇒B⇒B
√204√204
=8√5=4√10
Vậy A đúng
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.