Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 138)
138.
{(476 + 424)2 - 4 x 476 x 424} = ?
Answer: Option
Explanation:
| Given Exp. | = [(a + b)2 - 4ab], where a = 476 and b = 424 |
| = [(476 + 424)2 - 4 x 476 x 424] | |
| = [(900)2 - 807296] | |
| = 810000 - 807296 | |
| = 2704. |
Discussion:
11 comments Page 2 of 2.
Harsha said:
4 weeks ago
@Clearly we found (a+b)^2 -4ab.
By solving a^2 + b^2 + 2ab - 4ab = a^2 + b^2 - 2ab = (a-b)^2.
By solving a^2 + b^2 + 2ab - 4ab = a^2 + b^2 - 2ab = (a-b)^2.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers