tolong di bantu ya kakak kakak

[tex] \frac{12}{4 - \sqrt{10} } \\ = \frac{12}{4 - \sqrt{10} } \times \frac{4 + \sqrt{10} }{4 + \sqrt{10} } \\ = \frac{12(4 + \sqrt{10} )}{16 - 10} \\ = \frac{12(4 + \sqrt{10} )}{6} \\ = 2(4 + \sqrt{10} ) \\ = 8 + 2 \sqrt{10} [/tex]