Tentukan hasil dari 2 akar 72 - akar 50

[tex]2 \sqrt{72} - \sqrt{50} \\ = 2 \sqrt{36 } \sqrt{2} - \sqrt{25} \sqrt{2} \\ = 2 \times 6 \sqrt{2} - 5 \sqrt{2} \\ = 12 \sqrt{2} - 5 \sqrt{2} \\ = 7 \sqrt{2} [/tex]