hasil dari 1/4 akar 2 + 4/akar 2 - 1/akar 8

1/(4√2) + 4/√2 - 1/√8
= 1/(4√2) + 4/√2) - 1/√(4 × 2)
= (1 + 4)/{(4 + 1)√2} - 1/(2√2)
= 5/(5√2) - 1/(2√2)
= (5 - 1)/{(5 - 2)√2}
= 4/(3√2)
= 4/(3√2) × 3√2/(3√2)
= 12√2/(9 × 2)
= 12√2/18
= ⅔√2