Bantu jawab Kak nomor 9

6√8 – 4√32 + √128 =
6√4 x 2 – 4√16 x 2 + √64 x 2 =
6 x 2 √2 – 4 x 4 √2 + 8√2 =
12√2 – 16√2 + 8√2 = 4√2 (B)