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Aptitude
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Verbal Reasoning
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Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
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Simplification
If a - b = 3 and a2 + b2 = 29, find the value of ab.
10
12
15
18
Show Answer
Correct Answer:
10
Explanation:
2
ab
= (
a
2
+
b
2
) - (
a
-
b
)
2
= 29 - 9 = 20
⟹
ab
= 10.
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