Tolong kak Bantu nomer 5 !!

√18+√32-√8
= √9x2 + √16x2 - √4x2
=3√2 + 4√2 - 2√2
=5√2

√18 + √32 - √8
Jawab :
√9.2 + √8.4 - √4.2
3√2 + 2√8 - 2√2
3√2 + 2√4.2 - 2√2
3√2 + 2.2√2 - 2√2
3+4-2√2
7-2√2
5√2