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

Which complex number is equivalent to (5 + 12i) − (9i2 − 6i), where i = −1 ?
asked 178k views
5 votes
Which complex number is equivalent to (5 + 12i) − (9i2 − 6i), where i =
−1
?

asked
User Rana Soyab
by
8.0k points

2 Answers

2 votes

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

answered
User Serpiton
by
8.5k 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}}

answered
User Rinor
by
8.0k points
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