Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 6)
6.
If a = 0.1039, then the value of 4a2 - 4a + 1 + 3a is:
Answer: Option
Explanation:
4a2 - 4a + 1 + 3a = (1)2 + (2a)2 - 2 x 1 x 2a + 3a
= (1 - 2a)2 + 3a
= (1 - 2a) + 3a
= (1 + a)
= (1 + 0.1039)
= 1.1039
Discussion:
71 comments Page 7 of 8.
Abul said:
1 decade ago
Can anyone explain how (1-2a) instead of (2a-1) ?
Ravi said:
1 decade ago
In the question why he has not taken as 2a-1^2 ?
Joginder said:
1 decade ago
I have the same doubt, why cant it be (2a-1)2.
Barjinder singh said:
10 years ago
Is there any other method to solve it?
Gupta said:
9 years ago
How is it 1-2a? It should be 2a-1.
Pallavi said:
3 years ago
Any anyone explain this clearly.
(2)
Mithun said:
1 decade ago
sqrt(4a2-4a+1)=2a-1 or 1-2a?
Surya said:
7 years ago
Why not 2a-1?
How can 1-2a?
How can 1-2a?
Soumya said:
1 decade ago
Krishna nice explanation.
Amitabha Das said:
7 years ago
It can also be (2a-1)^2.
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