Answer:
12.
13. 9√2
Step-by-step explanation:
12. 4√3-√12+√18
4√3-2√3+√18
2√3+√18
13.(2√12-3√1/3)√6
(4√3 - 3√(1/3))√6
4√18 - 3√(6/3)
12√2-3√2
9√2
I think it’s six because 3n=6-5 3 n=6-5 then subtract 5 5 from 6 6
answer in photo
hope this helps :)