tolong bantuin yg no 5 6 7

Semoga ga salah yaa...

Ijinkan saya mencoba menjawab

No. 5 :
--> √6 + 4√6 - 3√6
= 5√6 - 3√6
= 2√6

No.6 :
--> √8 + √2 + √32
= √(4 x 2) + √2 + √(16 x 2)
= 2√2 + √2 + 4√2
= 3√2 + 4√2
= 7√2

No. 7 :
--> 2√3 - √27 + √48
= 2√3 - √(9 x 3) + √(16 x 3)
= 2√3 - 3√3 + 4√3
= -√3 + 4√3
= 3√3