Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 9)
9.
The square root of (7 + 35) (7 - 35) is
Answer: Option
Explanation:
| (7 + 35)(7 - 35) | = | (7)2 - (35)2 | = 49 - 45 = 4 = 2. |
Discussion:
24 comments Page 2 of 3.
Rafeeq said:
8 years ago
In the question, it is mentioned Square root of....
And the given no is (a+b)(a-b) form. After solving using this formula you will get 4 as the answer. Now note the question, it is mentioned as the square root of. Hence we have to take the whole square root. Hope my answer will be understood by everyone.
And the given no is (a+b)(a-b) form. After solving using this formula you will get 4 as the answer. Now note the question, it is mentioned as the square root of. Hence we have to take the whole square root. Hope my answer will be understood by everyone.
Vidya Channabasava Kabber said:
8 years ago
The answer should be 4. How it is 2. Can you explain?
Anil said:
9 years ago
3√3 * (4) how to solve this?
Please help me.
Please help me.
Amu said:
1 decade ago
(a+b)(a-b) = a^2-b^2
So ans must be 4 What is the necessity to take square root?
Please explain me.
So ans must be 4 What is the necessity to take square root?
Please explain me.
Pradhi said:
9 years ago
The answer should be 4 only. There is no whole square root is given in question.
Selvi said:
9 years ago
As per my knowledge, the answer should be 4.
Joe said:
1 decade ago
Am confuse if (7)^2 = 49 then how possible (35)^2=45?
Rachana said:
1 decade ago
Correct Answer is 2 (because question about square root not square) :).
Keshav kumar mishra said:
1 decade ago
The question is in the form of (a+b)(a-b) and
So that,
7*7 = 49.
49-45 = 4.
So that,
7*7 = 49.
49-45 = 4.
S.ramu said:
1 decade ago
Just applying the formula (a+b)*(a-b) = a^2-b ^2.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers