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.
Farman said:
8 years ago
Let's look it if a2+b2=25 and a-b=3 ab=?
25-(3)^2=16 then 16/2 =8.
25-(3)^2=16 then 16/2 =8.
Sanjay rajput said:
8 years ago
a+b/a+b-a+3b/a+b+a+5b/a+b to 15th term sum of numbers.
Adwait Phadke said:
8 years ago
@Deepa.
a/b=2/3
so 3a=2b
Substituting 3a=2b in eqn
3a+5b/3a-5b
=2b+5b/2b-5b
=7b/-3b.
=-7/3.
a/b=2/3
so 3a=2b
Substituting 3a=2b in eqn
3a+5b/3a-5b
=2b+5b/2b-5b
=7b/-3b.
=-7/3.
Samuel said:
8 years ago
If a=? and b=4. Find the value of 3a+b.
Can anyone solve this?
Can anyone solve this?
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=?
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= ?
Kanishka said:
8 years ago
If x+1/x=3, then find the value of x^3+1/x^3.
Arpitha sharma said:
8 years ago
Here, (2a-3b) (4a^+6ab+9b^) +27b^3.
Bubhiramsingh said:
8 years ago
If log ab=log(a+b) then proved(a+b)2-(a-b)2 = 4(a+b).
Chirag said:
8 years ago
I didn't understand. Please tell me.
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