bentuk 9/2√2-√5 dapat disederhanakan menjadi

[tex] = \frac{9}{2 \sqrt{2} - \sqrt{5} } \times \frac{2 \sqrt{2} + \sqrt{5} }{2 \sqrt{2} + \sqrt{5} } \\ = \frac{18 \sqrt{2} + 9 \sqrt{5} }{8 - 5} \\ = \frac{18 \sqrt{2} + 9 \sqrt{5} }{3} \\ = 6 \sqrt{2} + 3 \sqrt{5} [/tex]

Semoga membantu ✔

       9               2√2 +√5               9(2√2 + √5)
------------  x   ---------------     =    -------------------
2√2 - √5           2√2 + √5                  8 - 5
 
                                                    9(2√2 + √5)
                                            = ----------------------
                                                           3

                                            =       3(2√2 + √5)
                                            =       6√2 + 3√5
Semoga membantu