Surviving College Algebra
"When all you want is the grade"
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Complex Zero's
Complex Zero’s are simply expressions, and always occur in pairs.  These are the imaginary roots that
were discussed earlier.  All imaginary roots have the letter i in them. That is what makes them
imaginary and can be written in the form a + bi.  It is a rule that complex zero’s always come in pairs
and if a + bi is a zero then so is a – bi.  Also, if a – bi is a root then so is a + bi.  For example, if 2 + 4i is
a zero then so is 2 – 4i.