Mathematics
Mathematics, 13.12.2020 08:40, neylabaker7489

If a²-b²=21 and a²+b²=29, which of the following could be the value of ab? 1. -10
2. 5√2
3. 10

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If a²-b²=21 and a²+b²=29, which of the following could be the value of ab? 1. -10
2. 5√2

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