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(3i-5)(6i+3)
(3i - 5)(6i + 3) Apply complex arithmetic rule: (a+bi)(c+di)=(ac-bd)+(ad+bc)i; a= -5, b = 3, c = 3, d = 6 =(-5 * 3 - 3 * 6) + (-5 * 6 + 3 * 3)i; = -33 + (-21)i; = -33 -21i
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Asked 10/21/2013 12:06:44 PM
Updated 320 days ago|9/4/2017 1:51:53 PM
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(3i - 5)(6i + 3)

= 18i^2 + 9i - 30i - 15;

= 18i^2 - 21i - 15
Added 320 days ago|9/4/2017 11:51:15 AM
This answer has been flagged as incorrect.
Flagged by jeifunk [9/4/2017 12:36:37 PM]
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[Deleted]
Added 320 days ago|9/4/2017 1:48:43 PM
This answer has been added to the Weegy Knowledgebase
Deleted by alfred123 [9/4/2017 1:50:54 PM]
3
[Deleted]
Added 320 days ago|9/4/2017 1:51:06 PM
This answer has been added to the Weegy Knowledgebase
Deleted by alfred123 [9/4/2017 1:51:46 PM]
3
(3i - 5)(6i + 3)

Apply complex arithmetic rule: (a+bi)(c+di)=(ac-bd)+(ad+bc)i;

a= -5, b = 3, c = 3, d = 6

=(-5 * 3 - 3 * 6) + (-5 * 6 + 3 * 3)i;

= -33 + (-21)i;

= -33 -21i

Added 320 days ago|9/4/2017 1:51:53 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [9/4/2017 2:12:56 PM]
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