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 8 of 11.
Saad said:
9 years ago
If a2 - b2 = 30 and a - b = 5, then find the value of ab?
Deepa Shrestha said:
8 years ago
If a/b=2/3 then 3a + 5b / 3a - 5b =?
Solve this problem?
Solve this problem?
(1)
Nagaraj said:
9 years ago
a^2+b^2 = 29,
a = 5, b = 2.
5^2 + 2^2 = 29.
Thank you.
a = 5, b = 2.
5^2 + 2^2 = 29.
Thank you.
Abhijeet said:
8 years ago
It'snot an equation.
We take the equation:
3a+b
3a+4= ?
We take the equation:
3a+b
3a+4= ?
Sanjay rajput said:
8 years ago
a+b/a+b-a+3b/a+b+a+5b/a+b to 15th term sum of numbers.
Dharmender meena said:
8 years ago
(a-b)2=a2+b2-2ab.
9=29-2ab,
2ab=29-9,
ab=20/2,
ab=10.
9=29-2ab,
2ab=29-9,
ab=20/2,
ab=10.
Bubhiramsingh said:
8 years ago
If log ab=log(a+b) then proved(a+b)2-(a-b)2 = 4(a+b).
Krishna said:
1 decade ago
a2+b2=(a-b)(a-b)+2ab hota hi 3*3+2ab=29,2ab=20,ab=10
Arshiya said:
1 decade ago
If (a-b) = 7 ab = 9, then find the value of (a2+b2)?
Yaswanth chinni said:
9 years ago
2ab = (a2 + b2) - (a - b)2.
= 29 - 9 = 20,
ab = 10.
= 29 - 9 = 20,
ab = 10.
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