express in rectangular form

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express $\frac{15 + 10i}{1 + 2i}$ in rectangular form

Guest Apr 1, 2020

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Hey I'm in Honors Geometry let us try some algebra II!

Rectangular form is $a + bi$ according to https://www.youtube.com/watch?v=o0b1dSn_yNY

I learned from this video https://www.youtube.com/watch?v=a6RL2vmmPOU to do the following:

$\frac{15 + 10i}{1+2i}*\frac{1-2i}{1-2i}=\frac{15+10i-30i+20}{1-2i^2}=\frac{35-20i}{3}$

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Very nice, AELN !!!!!

CPhill Apr 1, 2020

AnExtremelyLongName · Answer 1 · 2020-04-01T02:45:48

Hey I'm in Honors Geometry let us try some algebra II!

Rectangular form is $a + bi$ according to https://www.youtube.com/watch?v=o0b1dSn_yNY

I learned from this video https://www.youtube.com/watch?v=a6RL2vmmPOU to do the following:

$\frac{15 + 10i}{1+2i}*\frac{1-2i}{1-2i}=\frac{15+10i-30i+20}{1-2i^2}=\frac{35-20i}{3}$