tolong bantu ya , mau nanya lagi

B. 9-3√7
MAAF KALO SALAH

[tex] \frac{6}{3 - \sqrt{7} } \times \frac{3 + \sqrt{7} }{3 + \sqrt{7} } \\ \frac{18 + 6 \sqrt{7} }{9 + 3 \sqrt{7} - 3 \sqrt{7} - 7} \\ \frac{18 + 6 \sqrt{7} }{2} \\ \frac{6(3 + \sqrt{7}) }{2} \\ 3(3 + \sqrt{7} ) \\ 9 + 3 \sqrt{7} [/tex]