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.
MBA P said:
8 years ago
If a * b = 3a - 2b.
Find (4*2)*7 WHAT DOES THIS MEAN?
EXPLAIN ME PLEASE.
Find (4*2)*7 WHAT DOES THIS MEAN?
EXPLAIN ME PLEASE.
Abid said:
8 years ago
Please solve this problem.
If √a + √b- √c = 0 Then find (a+b-c)^2.
If √a + √b- √c = 0 Then find (a+b-c)^2.
Akhthar khilji said:
8 years ago
Please verify this, is it right or wrong?
My method is
As a^2+b^2=29
(a+b)(a-b)=29----> 1
Given a-b=3----> 2
Put 2 in 1
(a+b)3=29----> 3
(a+b)=29/3
(a+b)=9.6666----> 4
Putting 4 in 3
9.6666 * 3=29.
Thus it satisfies the equation,
29 = 29.
My method is
As a^2+b^2=29
(a+b)(a-b)=29----> 1
Given a-b=3----> 2
Put 2 in 1
(a+b)3=29----> 3
(a+b)=29/3
(a+b)=9.6666----> 4
Putting 4 in 3
9.6666 * 3=29.
Thus it satisfies the equation,
29 = 29.
Ashif rahim said:
8 years ago
Answer : A=5 & B=2. AB = 10.
Govind said:
8 years ago
If a+b+c=0 then {(a^2 + b^2 + c^2)^2} / {(a^2 * b^2) + (b^2 * c^2) + (c^2 * a^2)}.
Rishabh said:
8 years ago
3^a, 5^-b, 15^c find 1/a-1/b-1/c. Please solve this.
Harshit shrivastava said:
8 years ago
Please solve my question.
If a + b = -5 find the value of a^3+b^3+125.
If a + b = -5 find the value of a^3+b^3+125.
Raman deep said:
8 years ago
If (2-a+b, b)=(6, 2), then find the value of a and b. Can anyone solve this?
Nripendra said:
8 years ago
If a2+b2=25 and ab=12 then find the value of a2-b2? Can anyone tell me?
(1)
Deepa Shrestha said:
8 years ago
If a/b=2/3 then 3a + 5b / 3a - 5b =?
Solve this problem?
Solve this problem?
(1)
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