dawaunlewis110 dawaunlewis110

26-11-2018
Mathematics

contestada

How to multiply this (7 + i)(6 − 7i) ?

Respuesta :

Guccibag1718 Guccibag1718

26-11-2018

What you need to do is first multiplying by using the Foil method. The foil method is multiplying the terms which occur last in each binomial

Than you combine the real imaginary parts of the expression. so the Answer is

49 - 43i Hope this helps :)

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ederrp6zy8i ederrp6zy8i

26-11-2018

FOIL

7(6)+7(-7i)+6(i)+i(-7i)

42-49i+6i-7i^2

7i^2-43i+42

Answer Link

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