Answer:

Step-by-step explanation:
Using the rules of radicals
= 
×
⇔ 
Given
= 
Simplifying the radicals
= 
= 
=
×
= 7
and
= 8
The simplified radical is

Answer:
the second one is the anwser
Step-by-step explanation:
First is yes
Second is no
Third is no
Fourth is no
First simplify the like terms.
3 (2x+3y)
Now multiply 3 by 2x then 3 by 3y
6x + 9y
And that is the final answer