Aptitude - Surds and Indices - Discussion
Discussion Forum : Surds and Indices - General Questions (Q.No. 15)
15.
| If x = 3 + 22, then the value of |  |
x | - | 1 |  |
is: |
| x |
Answer: Option
Explanation:
|
x | - | 1 | |
2 | = x + | 1 | - 2 |
| x | x |
| = (3 + 22) + | 1 | - 2 |
| (3 + 22) |
| = (3 + 22) + | 1 | x | (3 - 22) | - 2 |
| (3 + 22) | (3 - 22) |
= (3 + 22) + (3 - 22) - 2
= 4.
 |
|
x | - | 1 | |
= 2. |
| x |
Discussion:
48 comments Page 5 of 5.
Nicky said:
10 years ago
Why we subtract -2 in 1st step?
Surendran said:
5 years ago
Agree, It's (a-b) ^2 formula.
(1)
Suma said:
9 years ago
Answer is 4 how do you get 2?
Felix said:
8 years ago
How did you obtain 1/x +x -2?
(3)
Rohit said:
9 years ago
Answer is 4 how do you get 2?
Deepa said:
3 years ago
Please explain the 4th step.
(2)
Anuradha said:
1 decade ago
Its same as (a-b)^2 formula.
Valens said:
9 years ago
How 4 = 2 at last?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers