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timama [110]
3 years ago
13

How do you do this one?

Mathematics
1 answer:
tankabanditka [31]3 years ago
7 0

Your answer is correct... i^2=-1, so

(3+i)(i^2+8i-2)=(3+i)(-3+8i)

Then distributing 3+i to both terms on the right gives

(3+i)(-3)+(3+i)(8i)=(-9-3i)+(24i+8i^2)=-9-3i+24i-8=-17+21i

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