2 years ago

5. 4i(-2 - 4i)

Mathematics

1 answer:

Wewaii [24]2 years ago

4 0

Answer:

$4i( - 2 - 4i) = - 8i + 16 \\ \\ 5i.i.( - 2i) = 10i \\ \\ (- 5 - i)(1 + i) = -5-5i-i+1\\=-4-6i$

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