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tatuchka [14]
3 years ago
7

Write the expression -5i(1 + 3i) as a complex number in standard form.

Mathematics
1 answer:
klasskru [66]3 years ago
6 0
-5i(1 + 3i) = -5i -15i^2 = 15-5i

i*i = -1 as you know.
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