82.0k views
1 vote
Can you tell me how I solve complex number operations (-5+4i)(-8+5i)

User Celavek
by
8.7k points

2 Answers

3 votes

Answer:

20 - 57i

Explanation:

(-5 + 4i)(-8 + 5i) =

Multiply the complex numbers as you'd multiply two binomials.

= 40 - 25i - 32i + 20i^2

Remember that i^2 = -1.

= 40 - 57i + 20(-1)

= 40 - 57i - 20

= 20 - 57i

User Gelonida
by
8.3k points
5 votes

Answer:

40-57i+20i2

Explanation:

User UnsignedByte
by
9.1k points

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