If a - b = 3 and a2 + b2 = 29, find the

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

Options:

A . 10

B . 12

C . 15

D . 18

Answer: Option A

2ab = (a² + b²) - (a - b)²

= 29 - 9 = 20

ab = 10.

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