tolong yg dibulatkan ya ka:)

[tex] \frac{4}{5 + \sqrt{6} } \\ = \frac{4}{5 + \sqrt{6} } \times 1 \\ = \frac{4}{5 + \sqrt{6} } \times \frac{5 - \sqrt{6} }{5 - \sqrt{6} } \\ = \frac{4(5 - \sqrt{6} )}{(5 + \sqrt{6})(5 - \sqrt{6} )} \\ = \frac{4(5 - \sqrt{6} )}{25 - 6} \\ = \frac{4(5 - \sqrt{6} )}{19} \\ = \frac{4}{19} (5 - \sqrt{6}) \\ = \frac{20}{19} - 4 \sqrt{6 } \\ = \frac{20 - 4 \sqrt{6} }{19} [/tex]

itu tiga jawaban dari bawah hasilnyaa sama kokk
smogaa membantu:D