If a - b = 3 and a2 + b2 =...

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If a - b = 3 and a² + b² = 29, find the value of ab.

A. 10

B. 12

C. 15

D. 18

E. None of these

Answer: Option A

Solution(By Examveda Team)

2ab = (a² + b²) - (a - b)²
2ab = 29 - 9
2ab = 20
∴ ab = 10

This Question Belongs to Arithmetic Ability >> Simplification

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Comments ( 1 )

Kaushal Singh :

2 years ago

Good Explanation

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If a - b = 3 and a² + b² = 29, find the value of ab.

A. 10

B. 12

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E. None of these

View Answer

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If a - b = 3 and a2 + b2 =...

If a - b = 3 and a2 + b2 = 29, find the value of ab.

Solution(By Examveda Team)

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Comments ( 1 )

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If a - b = 3 and a² + b² = 29, find the value of ab.