Simplify the expression (10 + 3i)(10 − 3i). I understand how to distribute and what not, i just don’t know what to do with i.

Question

Simplify the expression (10 + 3i)(10 − 3i).

I understand how to distribute and what not, i just don’t know what to do with i.

I got to -9i^2+10

1st CORRECT answer gets brainiest .
i=i
i^2=-1
i^3=-i
i^4=1

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Vân Khánh 4 years 2021-08-17T14:38:48+00:00 2 Answers 17 views 0

Answers ( )

  1. huyenthanh
    0
    2021-08-17T14:39:52+00:00
    Reply

    Answer:

    Step-by-step explanation:

    91
    −
    60
    i

  2. Nem
    0
    2021-08-17T14:40:31+00:00
    Reply

    Answer:

    109

    Step-by-step explanation:

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )