Fundamental Theorem of Algebra

What this lesson shows

A polynomial of degree 9. How many roots does it have? Not "how many can you find" — how many ARE there?

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Real questions from this lesson's worksheets — answers below each one.

1. By the Fundamental Theorem of Algebra, a degree-2 polynomial has exactly how many roots (counting multiplicity)?
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2. How many roots (with multiplicity) does x² + 2x - 3 = 0 have?
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   2
3. A polynomial of degree 3 has at most how many turning points?
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   2
4. A degree-2 polynomial has 2 roots in total, and 0 of them are real. How many of its roots are NOT real numbers?
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   2