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(2 + 5i)(2 + i) please help me to understand how to do it

(2 + 5i)(2 + i) please help me to understand how to do it
asked 197k views
1 vote
(2 + 5i)(2 + i)

please help me to understand how to do it

asked
User Garrette
by
7.7k points

1 Answer

1 vote
(2 + 5i)(2 + i)
= 4 + 10i + 2i + 5i^2
= 4 + 12i + 5i^2
answered
User Kshirish
by
7.8k points
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