Question

The rationalising factor of $5+2\sqrt{6}$ is

• A. $-2\sqrt{6}-5$
• B. $\sqrt{6}-10$
• C. $6-2\sqrt{5}$
• D. $5-2\sqrt{6}$

Answer 1

Answer: (D)

$5-2\sqrt{6}$

Rationalising factor for the given expression is

= $5-2\sqrt{6}$

hence, option D is correct.