Rasionalkan bentuk akar berikut
[tex]\frac{5}{2 + \sqrt{5}} = \frac{5}{2 + \sqrt{5}} \times \frac{2 - \sqrt{5}}{2 - \sqrt{5}} = \frac{(5)(2 - \sqrt{5})}{(2 + \sqrt{5})(2 - \sqrt{5})} [/tex]
[tex]= \frac{10 - 5 \sqrt{5}}{4 - 2 \sqrt{5} + 2 \sqrt{5} - \sqrt{25}} [/tex]
[tex]= \frac{10 - 5 \sqrt{5}}{4 - \sqrt{25}} = \frac{10 - 5 \sqrt{5}}{4 - 5} = \frac{10 - 5 \sqrt{5}}{ - 1} = 5 \sqrt{5} - 10[/tex]
[answer.2.content]
