Question

if x square =11 +2 root 30, find 1 by x​

Answer 1

https://brainly.in/question/1293249
find the square root of 11 + 2 root 30 - Brainly.in

Answer 2

Answer:

11-2√30

Step-by-step explanation:

if :

x=11+2√30

then,

1/x=1/(11+2√30)

now rationalizing the denominator,we get

=> 1/(11+2√30) = 1/(11+2√30) * (11-2√30)/(11-2√30)

=> 11-2√30/{(11)^2-(2√30)^2}. * [by applying (a+b)(a-b)=(a^2-b^2)]

=> 11-2√30/{121-(4*30)}

=>11-2√30/(121-120)

=> 11-2√30/1

=> 11-2√30

Therefore,

1/x=11-2√30