akar18 kurang akar8 sederhana kan

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

√18 - √8
= √9x2 - √4x2
= 3√2 - 2√2
= 1√2
=√2