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
40-57i+20i2
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