hasil dari akar128-3akar50+4akar8+3akar18

√128 - 3√50 + 4√8 + 3√18
= √(64.2) - 3√(25.2) + 4√(4.2) + 3√(9.2)
= 8√2 - 3(5)√2 + 4(2)√2 + 3(3)√2
= 8√2 - 15√2 + 8√2 + 9√2
= (8-15+8+9)√2
= 10√2