Problem 147 of 7
Solve polynomial inequality using zeros and sign behavior: p(x)>=0 from sign chart.
Hints
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identify intervals above/below x-axis.
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Use real zeros as boundary points and respect strict versus non-strict inequality.
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Solution
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1. Find real zeros and make sign intervals.
2. Determine sign on each interval.
3. Select intervals satisfying the inequality and handle endpoints.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Including zeros in strict inequalities.