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

User Rana Soyab
by
5.0k points

2 Answers

2 votes

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

User Serpiton
by
5.6k points
4 votes

Answer:

14 + 18i

Explanation:


(5 + 12i) - (9 {i}^(2) - 6i) \\ = (5 + 12i) - (9 * (- 1) - 6i) \\ = (5 + 12i) - ( - 9 - 6i) \\ = (5 + 12i) + ( 9 + 6i) \\ = 5 + 12i + 9 + 6i \\ \red { \bold{ = 14 + 18i}}

User Rinor
by
4.7k points
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