Problem 136 of 7
Determine interval sign of polynomial from zeros for even-multiplicity zero.
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test intervals or use multiplicity behavior.
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Use test intervals or multiplicity sign-change behavior.
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Solution
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1. Order the real zeros on the number line.
2. Use test points or multiplicity rules.
3. Record sign on each interval.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Sign changes at even-multiplicity zeros.