katyagrig7 katyagrig7

13-12-2020
Mathematics

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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
3. 10

Respuesta :

Аноним Аноним

13-12-2020

Answer:

ab = 10 or -10

Step-by-step explanation:

........

.

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