Warm Up 9-3
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What are the possible rational roots for f(x)= 𝑥 4 − 𝑥 3 + 𝑥 2 + 𝑥 − 12?
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Is 0 a lower bound for 𝑓 𝑥 = 𝑥 3 − 4𝑥 2 + 7𝑥 − 2?
Homework Questions
Announcements
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Quiz Tuesday!
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Test Thursday!
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HW practice 1-13 PNI charts and finding roots
Finding Zeros of Polynomial Functions –
Day 1
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Notes
PNI Charts
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Positive Roots – Count number of sign changes in f(x)
and decrease by twos till zero
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Negative Roots – Count number of sign changes in f(-x)
and decrease by twos till zero
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Imaginary Roots – Count up positive and negative roots
and add until degree of f(x) is reached
Notes and Practice