Question

Find the product of (13 + 5i)(5 + 4i)​

Answer 1

Answer:

(13 + 5i) (5 + 4i)

⇒ 13 * 5 + 13 * 4i + 5i * 5 + 5i * 4i

⇒ 65 + 52i + 25i + 20i²

⇒ 65 + 52i + 25i - 20

⇒ 45 + 77i

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Answer 2

hope it helps......... .