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Need help if (x+yi)+(2(x+yi)+3i)=9,what is x+yi?
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Need help if (x+yi)+(2(x+yi)+3i)=9,what is x+yi?

Need help if (x+yi)+(2(x+yi)+3i)=9,what is x+yi?-example-1
User Malletjo
by
4.4k points

1 Answer

4 votes

Answer:

A

Explanation:

(x+yi)+(2(x+yi)+3i)=9

x+yi+2x+2yi+3i=9

3x+3yi+3i=9+0i

equating real and imaginary parts

3x=9,x=9/3=3

3y+3=0

3y=-3

y=-3/3=-1

x+yi=3-i

User Isobolev
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4.0k points
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