Rationalise the denominator of : 1 3 + 2
We have,
1 3 + 2 = 1 3 + 2 × 3 - 2 3 - 2 = 3 - 2 9 - 2 = 3 - 2 7
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