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 7 of 11.
Rushah said:
9 years ago
@Antara.
It's very easy. Remove brackets and multiply you got 2ab.
It's very easy. Remove brackets and multiply you got 2ab.
Dinesh said:
8 years ago
Let us assume a=5, b=2.
a^+b^=25+4=29.
a-b =5-2=3.
So ab=5*2=10.
a^+b^=25+4=29.
a-b =5-2=3.
So ab=5*2=10.
Manjunatha dv said:
1 decade ago
a-b = 3.
5-2 = 3.
a^2+b^2 = 29.
5^2+2^2 = 29.
Answer = 5*2 = 29.
5-2 = 3.
a^2+b^2 = 29.
5^2+2^2 = 29.
Answer = 5*2 = 29.
Akash said:
8 years ago
Would anyone, please solve it.
X/y+y/x=8,then x^4/y^4+y^4/X^4=?
X/y+y/x=8,then x^4/y^4+y^4/X^4=?
Antara chatterjee said:
9 years ago
a2 + b 2= 52,and a - b = 2. Then ab?
Anyone solve this problem.
Anyone solve this problem.
Samuel said:
8 years ago
If a=? and b=4. Find the value of 3a+b.
Can anyone solve this?
Can anyone solve this?
Anita said:
1 decade ago
a = 2, b = 5.
a-b = 3.
2*2 + 5*5.
4+25 = 29.
Then ab = 10.
a-b = 3.
2*2 + 5*5.
4+25 = 29.
Then ab = 10.
Mangesh said:
9 years ago
Please give the answer of (a-b) =4 ab=52.25 then a^2 * b^2 = ?
Pritam das said:
1 decade ago
(a-b)^2+2ab=29
or,(3)^2+2ab=29
or,9+2ab=29
or,2ab=20
or,ab=10
or,(3)^2+2ab=29
or,9+2ab=29
or,2ab=20
or,ab=10
Shanto said:
8 years ago
a/b=4a, 2b=12, than what is the value of a? or is it wrong?
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