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maxonik [38]
3 years ago
8

How you do multiply complex numbers ? Example : (9 - 4i) (8 + 6i)

Mathematics
1 answer:
Andrew [12]3 years ago
6 0

You multiply them just as you would multiply any normal polynomials, except there is a special rule. Since we know that i = √-1, the rule is that i² = -1. So, let's multiply:

(9-4i)(8+6i) = 72+54i-32i-24i^2

Let's simplify this:

72+22i+(-24*-1)

72+22i+24 = 96+22i

Therefore, your answer is 96 + 22i.

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