Aptitude - Decimal Fraction - Discussion
Discussion Forum : Decimal Fraction - General Questions (Q.No. 12)
12.
| 4.2 x 4.2 - 1.9 x 1.9 | is equal to: |
| 2.3 x 6.1 |
Answer: Option
Explanation:
| Given Expression = | (a2 - b2) | = | (a2 - b2) | = 1. |
| (a + b)(a - b) | (a2 - b2) |
Discussion:
14 comments Page 2 of 2.
Suresh said:
1 decade ago
But how you take the numerator as 4.2 = a^2. If it so means a^4-b^4 = 4. 2*4.2 - 1.9*1.9. I can't get your explanation.
Prasad said:
1 decade ago
But how to think that much logically?
Shubh said:
7 years ago
Nice & clear explanation. Thanks @Arvind.
Bittu Rana said:
2 months ago
(4.2-1.9)(4.2+1.9)/2.3*6.1.
So, the Answer: B 1.0
So, the Answer: B 1.0
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