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Mathematics 9 Online
OpenStudy (anonymous):

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

OpenStudy (earthcitizen):

-5i+15

OpenStudy (anonymous):

Thanks [:

OpenStudy (earthcitizen):

in polar form\[r \angle \theta = 15.8 \angle -18.4^o\]

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