Suppose that a polynomial function of degree 4 with rational coefficients has -2, -6, -5-i as zeros. Find the other zero.
1 answer:
<span>complex roots (zeros) occur in conjugate pairs __ if 7+4i is a zero, then 7-4i is also a zero
for the coefficients to be rational; any irrational zeros (sqrt(7)) must have a conjugate, so -sqrt(7) is also a zero</span>
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