HamdaYoosuf HamdaYoosuf

17-09-2022
Mathematics

contestada

Perform the operation and write the result in the standard form.
(1 + 9i)(1 - 9i)

Respuesta :

arthisaac004 arthisaac004

17-09-2022

Answer:

10-18i

Step-by-step explanation:

1(1-9i)+9(1-9i)

1-9i+9-9i

1+9-9i-9i

10-18i

Answer Link

17-09-2022

82+0i

Explanation:
(1+9i)(1-9i)
=(1-9i+9i-81i^2)
(Remember i^2 is -1)
=(1+81)
=82
In standard form, its written as 82+0i

Answer Link

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