Hasil dari akar18+akar50-akar72=

√18+√50-√72=4√2+7√1-8√8

[tex] \sqrt{18} + \sqrt{50} - \sqrt{72} \\ \sqrt{9 \times 2} + \sqrt{25 \times 2} - \sqrt{36 \times 2} \\ = 3 \sqrt{2} + 5 \sqrt{2} - 6 \sqrt{2} \\ = 2 \sqrt{2} [/tex]