Lilbre25 Lilbre25

17-04-2020
Mathematics

contestada

Which complex number is equivalent to (5 + 12i) − (9i2 − 6i), where i =
−1
?

Respuesta :

Hrishii Hrishii

17-04-2020

Answer:

14 + 18i

Step-by-step explanation:

[tex](5 + 12i) - (9 {i}^{2} - 6i) \\ = (5 + 12i) - (9 \times (- 1) - 6i) \\ = (5 + 12i) - ( - 9 - 6i) \\ = (5 + 12i) + ( 9 + 6i) \\ = 5 + 12i + 9 + 6i \\ \red { \bold{ = 14 + 18i}}[/tex]

Answer Link

morriscaleb144 morriscaleb144

21-01-2021

Answer: It's 14+18i I got a correct

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