lyrucdace17 lyrucdace17

27-01-2020
Mathematics

contestada

Question 2
What is the product of 3 – 5i and 2 + 7i ?

Respuesta :

jimrgrant1 jimrgrant1

27-01-2020

Answer:

41 + 11i

Step-by-step explanation:

Note that i² = - 1

Given

(3 - 5i)(2 + 7i) ← expand using FOIL

= 6 + 21i - 10i - 35i² ← collect like terms

= 6 + 11i + 35

= 41 + 11i

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