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Add the complex numbers 3+2i+1-5i.

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boroboacana | Student, Grade 10 | eNoter

Posted December 20, 2010 at 2:24 AM via web

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Add the complex numbers 3+2i+1-5i.

4 Answers | Add Yours

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giorgiana1976 | College Teacher | Valedictorian

Posted December 20, 2010 at 2:27 AM (Answer #1)

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The complex numbers from this addition are:

z1 = 3+2i and z2 = 1-5i

We'll add the real parts and the imaginary parts:

(3+1) + (-5i+2i)

4 - 3i

The complex number resulted from the addition of the given complex numbers z1 and z2 is:

z = z1 + z2

z = 4 - 3i, where the real part is Re(z) = 4 and the imaginary part is Im(z) = -3.

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted December 20, 2010 at 2:44 AM (Answer #2)

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We have to add 3 + 2i + 1 -5i.

When adding complex and real numbers complex terms can be added with each other only. The same goes for the real terms.

So 3 + 2i + 1 -5i

=> 3 + 1 + 2i -5i

=> 4 - 3i

The required result is 4 - 3i.

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neela | High School Teacher | Valedictorian

Posted December 20, 2010 at 3:22 AM (Answer #3)

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To add the complex numbers.

3+2i+1-5i.

Add the real numbers  and add the complex nnumbers.

3+2i+1-5i = (3+1)+(2i-5i).

3+2i+1-5i = 4+(2-5)i.

3+2i+1-5i  = 4 -3i.

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vikum1997 | Student, Grade 10 | eNotes Newbie

Posted February 25, 2012 at 9:23 PM (Answer #4)

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basically u just add the i's and the normals

2i-5i=-3i

3+1=4

answer= 4-3i

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