Adding and Subtracting Complex Numbers

Posted by Professor Cram in Complex Numbers

Complex Numbers: An Introduction

A complex number can be expressed in the form:

    a + bi

where a and b are real numbers.

The number i is defined as the square root of -1. It is an imaginary number, since the square root of any negative number is not a real number.

Complex numbers are not algebraic expressions. They are numbers, containing a real part (a) and an imaginary part (bi). 

Adding and Subtracting Complex Numbers

What are complex numbers, and what’s up with this imaginary number i? Use this Tab Tutor Series program to learn about complex numbers and see how to add and subtract them.

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5 Responses to “Adding and Subtracting Complex Numbers”

  1. hamstap85 says:

    I’ve been searching everywhere on the web for this question:

    The combination of complex numbers and fractions can be expressed as either:
    (a + bi)/(c + di)
    or:
    a/b + (c/d)i

    The a, b, c, and d in the two examples are not related, they are different numbers. I prefer the latter, as the former usually simplifies to the latter. In the form of the latter, how would one express the numerator and denominator of the entire complex number? Is it the numerator/denominator of the length r in complex polar coordinates? Please respond, I would really appreciate it.

  2. Batte Morris says:

    send me the answer on my email

  3. Batte Morris says:

    adding, subtracting, multiplying and dividing complex numbers in c programming language
    please send me the answer on my email

  4. Jane says:

    This was very helpful!!! Thanks so much!

  5. shubham says:

    hey can u solve the equation
    and make me undrstand how u do it
    find the value of x3-x2+x+46 if x=2+3i

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