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Grade:11

4 Answers

Arun
25750 Points
5 years ago
Dear student
 
Squaring on both the sides
 
2x +1 - 2x +1 - 2sqrt (4x²-1) = 1
 
sqrt (4x -1) = 1/2 
 
Hope it helps
 
Regards
Arun
 
 
mahima pareek
20 Points
5 years ago
Arun
I think you made a mistake while squaring it in the third step
Kindly check again. 
It is (a-b)^2 = a^2 + b^2 -2ab
And you wrote instead
(a - b)^2 = a^2 - b^2 - 2ab
Arun
25750 Points
5 years ago
Dear Mahima
 
I have used this as 
 
sqrt (1- 2x) and sqrt(2x-1) , theirs square are same hence I have use that term
mahima pareek
20 Points
5 years ago
Please Arun refer back to the question 
It is √2x+1 - √2x-1 = 1
Squaring it , we would get 
       2x+1 + 2x-1 - √4x^2-1 = 1 
God knows how you cancelled 2x from the above eqn when both are of plus sign. 

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