Question

rationalize the denominator ​

Answer 1

Answer:

$i) \frac{3}{ \sqrt{5} } = \frac{3}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } = \frac{3 \sqrt{5} }{5} \\ ii) \frac{6}{9 \sqrt{3} } = \frac{6}{9 \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{6 \sqrt{3} }{9 \times 3} = \frac{6 \sqrt{3} }{27} = \frac{2 \sqrt{3} }{9} \\ iii) \frac{5}{ \sqrt{7} } = \frac{5}{ \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} } = \frac{5 \sqrt{7} }{7}$