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# express in rectangular form

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

Apr 1, 2020

#2
+626
+2

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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Apr 1, 2020

#2
+626
+2

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:

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

AnExtremelyLongName Apr 1, 2020
#3
+111321
0

Very nice, AELN  !!!!!

CPhill  Apr 1, 2020