bentuk sederhana dari 3 akar 18 kurang akar 8

[tex] = 3 \sqrt{18} - \sqrt{8} \\ = 3 \sqrt{9 \times 2} - \sqrt{4 \times 2} \\ = (3 \times 3 \sqrt{2} ) - 2 \sqrt{2} \\ = 9 \sqrt{2} - 2 \sqrt{2} \\ = (9 - 2) \sqrt{2} \\ = 7 \sqrt{2} [/tex]

⇔3√18 - √8
⇔3√(3².2) - √(2².2)
⇔9√2 - 2√2
⇔7√2