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LenaWriter [7]
3 years ago
5

If c-d=7 and c=3-8i what is d a) -4+8i b)-4-8i c)4+8i d)4-8i

Mathematics
1 answer:
Zigmanuir [339]3 years ago
6 0

Answer:

Step-by-step explanation:

c - d = 7

c = 3 - 8i            Substitute into the top equation

3 - 8i - d = 7      Subtract 3 from both sides

- 8i - d = 7 - 3    Combine

-8i - d =4            Add 8i to both sides

-d = 4 + 8i           Multiply through by -1

-1*-d = -4 - 8i

d = - 4 - 8i

Looks like B is the answer.

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