akar 125+3 akar 216-3 ajar 343

[tex] = \sqrt{125} + 3 \sqrt{216} - 3 \sqrt{343} [/tex]
[tex] = \sqrt{25 \times 5} + 3 \sqrt{36 \times 6} - 3 \sqrt{49 \times 7} [/tex]
[tex] = 5 \sqrt{5 } + 18 \sqrt{6} - 21 \sqrt{7} [/tex]