Question

rationalising factor of root 2-root 7​

Answer 1

Answer:

Step-by-step explanation:

Rationalising factor means, the term by which we convert irrational number to rational number . so, it means I have to choose a term by which we make (√2-√7) is a rational number.

Let's try to solve .

= $\sqrt{2}-\sqrt{7}$

= − 1.23153774 …