Sederhanakan penyebut pecahan berikut dengan merasionalkan penyebutnya A.5/2√3 B.√6/3√3-√3

     5      2√3     10√3
a) ---- x -----  = --------
    2√3    2√3     4 x 3
                     = 10/12 √3
                     = 5/6√3

        √6         3√3 + √3      3√18 +√18
b) ----------- x ------------ = -----------------
    3√3 - √3    3√3 + √3        9(3) - 3

                                         4√9x2
                                     = ---------
                                         27 - 3
                                    
                                          4x3√2
                                     = -----------
                                            24

                                     = 1/2√2

a). 5 2√3. 10√3. 10√3
------ = ------ = ------- = -------
2√3 2√3. 4.3. 9
b). √6. 3√3-√3.
------------ = ------------ =
3√3-√3. 3√3-√3