Question 87854

    simplify the square root of 20 over 5 minus 1 over the square root of 5

    sq.rt 20 over5-1/sq.rt 5  , sq.rt 20 = 2.sq.rt 5
        2.sq.rt 5/sq.rt 5.sq.rt 5-1/sq.rt 5
         2/sq.rt 5-1/sq.rt 5 = 1/sq.rt 5  = 1.sq.rt 5/sq.rt 5.sq.rt 5
                                          = sq.rt 5/5.