Question

Rationalise the denominator

Answer 1

Answer:

$\sqrt{21} se \: dono \: ko \: multiply \: karo$

√21/3 aega

Answer 2

Answer:

$→\frac{7}{ \sqrt{21} } = \frac{7 \times \sqrt{21} }{ \sqrt{21} \times \sqrt{21} } = \frac{7 \sqrt{21} }{21} = \boxed{ \frac{ \sqrt{21} }{3} }✓$

• √21/3 is the right answer.