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m_a_m_a [10]
3 years ago
8

7

-formula">
Mathematics
1 answer:
erik [133]3 years ago
5 0

Answer:

= 21i

Step-by-step explanation:

√-9 = 3i

= 7 . 3i

Multiply the numbers: 7 . 3 = 21

= 21i

Hope this helps!

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