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Fofino [41]
2 years ago
7

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

Mathematics
1 answer:
Alchen [17]2 years ago
5 0

Answer:

14 + 18i

Step-by-step explanation:

(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}}

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bezimeni [28]
Hello the answer would be 18

Explanation:
lines KH and JK are congruent.

Line KH=c+18
Line JK=2c

2c=36 divide by 2
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4 0
2 years ago
I really need help with this question. Can I get a explanation too?
aniked [119]

Answer:

C

Step-by-step explanation:

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