Jawaban :

jika akarnya sama jadi tinggal dijumlakan, jika akarnya tidak sama maka disamakan terlebih dahulu.

1. 5√3 + 10√3 + 4√3 = (5 + 10 + 4)√3 = 19√3

2. 12√6 - 4√6 + √6 = (12 - 4 + 6)√6 = 14√6

3. 8 + 5√2 - √32 = 8 + 5√2 - √16×2 = 8 + 5√2 - 4√2 = (8 + 5 - 4)√2 = 9√2

4. 4√3 + 2√12 - 5√27 = 4√3 + 2√4×3 - 5√9×3 = 4√3 + 4√3 - 8√3 = (4 + 4 - 8)√3 = 0√3 = 0

5. 8√5 - √45 + √125 = 8√5 - √9×5 + √25×5 = 8√5 - 3√5 + 5√5 = (8 - 3 + 5)√5 = 10√5

6. √50 + √72 - √98 = √50 + √72 - √98 = √25×2 + √36×2 - √49×2 = 5√2 + 6√2 - 7√2 = (5 + 6 - 7)√2 = 4√2

7. 4√5 - √125 + 6√5 = 4√5 - √125 + 6√5 = 4√5 - √25×5 + 6√5 = 4√5 - 5√5 + 6√5 = (4 - 5 + 6)√5 = 5√5

8. √28 + √63 - √112 = √4×7 + √9×7 - √16×7 = 2√7 + 3√7 - 4√7 = (2 + 3 - 4)√7 = 1√7

semoga membantu, maaf jika ada kekurangan dan kesalahan