What is the conjugate of?
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What is the conjugate of
.
To find the conjugate of any complex number, replace i with -i. You could "rationalize the denominator" first, as "a tutor" did:
and then its conjugate is
. Or you can immediately write that the conjugate is
. If you were then to multiply both numerator and denominator by i you would again get
.
aw...i was gonna say find its minimal real polynomial, and grab the other root :P
What's the reason you multiplied the numerator and denominator by i?
tutor used the fact thatQuote:
Originally Posted by viccal
in order to get
in the form
in an efficient manner.
he ended up with... note that the conjugate is