Aptitude - Simplification - Discussion
Discussion Forum : Simplification - General Questions (Q.No. 4)
4.
If a - b = 3 and a2 + b2 = 29, find the value of ab.
Answer: Option
Explanation:
2ab = (a2 + b2) - (a - b)2
= 29 - 9 = 20
ab = 10.
Discussion:
107 comments Page 10 of 11.
Akash said:
1 decade ago
In a2+b2=29.
substract both side by 2ab.
substract both side by 2ab.
Alex said:
6 years ago
Thanks for explaining @Dharmender Meena.
(1)
Jisha said:
10 years ago
@Harisha can you explain your question?
Ashraf said:
7 years ago
I can't understand. Please explain me.
Raj said:
9 years ago
If a + 1/a = 4, then a^2 + 1/a^2 = ?
Chirag said:
8 years ago
I didn't understand. Please tell me.
Arpitha sharma said:
8 years ago
Here, (2a-3b) (4a^+6ab+9b^) +27b^3.
Sivakumar said:
7 years ago
Please explain the formula clearly.
Sharmila said:
1 decade ago
@Satish is correct this is easy.
Ashif rahim said:
8 years ago
Answer : A=5 & B=2. AB = 10.
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