Question

racionalização de denominadores

Answer 1

               15              3            3.√2          3√2
             ----------- = --------- = ---------- = --------
                5√2          √2            (√2)²          2

   
           1            3-√3               3-√3         3-√3     3-√3       1       √3
       ---------- * ------------ = -------------- = ----------- = ---------= ------ - ------
        3+√3         3-√3           3² - (√3)²     9-3           6          2        6