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Mathematics 13 Online
OpenStudy (jessicawade):

complex numbers help? will medal

OpenStudy (jessicawade):

Given the expression 5-4i/8-3i , perform the indicated operation and write the answer in the form a + bi.

OpenStudy (jdoe0001):

so... what's the "indicated operation" though?

OpenStudy (jdoe0001):

btw Mertsj good to see you back :)

OpenStudy (mertsj):

\[\frac{5-4i}{8-3i}\times \frac{8+3i}{8+3i}=\frac{40-15i-32i+12i^2}{64-9i^2}=\frac{40-47i-12}{64+9}\]

OpenStudy (mertsj):

Perhaps you can finish it from there.

OpenStudy (jessicawade):

40-47i-12= 28?

OpenStudy (mertsj):

There is one error: should be +15i in the numerator

OpenStudy (jessicawade):

where at?

OpenStudy (mertsj):

There is only one 15i term. Perhaps you can find it.

OpenStudy (mertsj):

And should be -12i^2

OpenStudy (jessicawade):

52/73

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