Question

solve the following : 1/7root5

Answer 1

Step-by-step explanation:

step 1 => rationalise the denominator

$\frac{1}{7 \sqrt{5} } \times \frac{7 \sqrt{5} }{7 \sqrt{5} }$

$\frac{7 \sqrt{5} }{ {7 \sqrt{5} }^{2} }$

$\frac{7 \sqrt{5} }{49 \times 5}$

step 2 => solve the fraction

$\frac{7 \sqrt{5} }{245}$

you get your answer

you might have a question that why rationalising?

answer is because rationalising helps us to simplify the fraction otherwise it will become a quite hard for you