2-✓7/3+✓7 Bentuk sederhana nya adalah...

[tex] = \frac{2 - \sqrt{7} }{3 + \sqrt{7} } \times \frac{3 - \sqrt{7} }{3 \times - \sqrt{7} } \\ = \frac{6 - 2 \sqrt{7} - 3 \sqrt{7} + 7}{9 - 7} \\ = \frac{13 - 5 \sqrt{7} }{2} \\ = \frac{13}{2} - \frac{5}{2} \sqrt{7} [/tex]