Ask Question
14 June, 17:40

Find the product of 5+i and 4-i

+5
Answers (1)
  1. 14 June, 18:01
    0
    21 - i

    Step-by-step explanation:

    (5+i) * (4-i) = 5 * (4-i) + i * (4-i)

    = 5*4 - 5*i + i*4 - i*i

    = 20 - 5i + 4i - i²

    = 20 - 5i + 4i - (-1) { i² = - 1 }

    = 20 - 5i + 4i + 1

    = 21 - i
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Find the product of 5+i and 4-i ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers