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25-01-2017
Mathematics

contestada

What is the product of (−7 + 4i) • (1 − 8i)
A. −39 − 52i
B. −39 + 60i
C. 25 − 52i
D. 25 + 60i

Respuesta :

MoonlightMelody MoonlightMelody

25-01-2017

1. Expand the equation
−7 + 56i + 4i +32

2. Gather like terms
(−7 + 32) + (56i + 4i)

3. Simplify
25 + 60i

The correct answer would be D. 25 + 60i

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