Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 35)
35.
| (963 + 476)2 + (963 - 476)2 | = ? |
| (963 x 963 + 476 x 476) |
Answer: Option
Explanation:
| Given Exp. = | (a + b)2 + (a - b)2 | = | 2(a2 + b2) | = 2 |
| (a2 + b2) | (a2 + b2) |
Discussion:
11 comments Page 2 of 2.
Abirami Balu said:
2 years ago
(a+b)^2+(a-b)^2
___________________
(a^2 +b^2)
= (a^2 + b^2 + 2ab)(a^2 +b^2 - 2ab)
--------------------------------------
(a^2 + b^2)
{ 2ab And - 2ab } cancels.
Then,
( a^2 + b^2) + (A^2 + b^2) becomes.
2( a^2 + b^2)
_______________
(a^2 + b ^2).
___________________
(a^2 +b^2)
= (a^2 + b^2 + 2ab)(a^2 +b^2 - 2ab)
--------------------------------------
(a^2 + b^2)
{ 2ab And - 2ab } cancels.
Then,
( a^2 + b^2) + (A^2 + b^2) becomes.
2( a^2 + b^2)
_______________
(a^2 + b ^2).
(1)
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