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