I'm asked to write the number 5/i in the a+bi form. The format is such that I can only enter the values of a and b in the computer. I'm not sure what I should write. Can anyone help me please?
Thanks a lot!
More generally, a complex number, a+ bi, multiplied by its "complex conjugate", a- bi, gives a non-negative real number: . In particular, you can make denominator or a fraction a real number by multiplying the numerator and denominator by the complex conjugate of the denominator: