Question

someone pls answer me​

Answer 1

Answer:

2(8-√10)/9

Explanation:

as it is given X= 7 +√40 which can also written as 7+2√10

by substituting it in √x+1/√x

√7+2√10 + 1/√7+2√10

=8+2√10/7+2√10

now rationalise it by multiplying by 7-2√10

and the we get 16-2√10/9

take out 2 as common in numerator then

we get 2(8-√10)/9