Question

rationalised the denominator 2/ 3√7​

Answer 1

Answer:

6√7/64

Step-by-step explanation:

2/3√7×3√7/3√7

6√7/9×7

6√7/63

Answer 2

Answer:

$3/ \sqrt{7} - 2$

$= 3/7 - 2 \times \sqrt{7} + 2/ \sqrt{7} + 2$

$= 3 \sqrt{7} + 6/( \sqrt{7} )^2 - (2)^2$

$= 3 \sqrt{7} + 6/7 - 4$

$= 3 \sqrt{7} + 6/3$