Rationalise the denominator of :
2 3
We know that the rationalisation factor for 1 a is a
∴ 2 3 = 2 3 × 3 3 = 2 3 3
Find the value to three places of decimals, of each of the following:
It is given that 2 = 1.414 , 3 = 1.732, 10 = 3.162 and 5 = 2.236 (approx.).
(i) 2 + 1 5 (ii) 2 - 3 3 (iii) 10 - 5 2