NSolve
 Usage
Notes
 Further Examples
Here is a degree- polynomial.
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Although Solve will find all of the solutions in symbolic form, NSolve is the function to use if you ultimately want numerical solutions.
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Here is a high degree polynomial.
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Not all roots are correct using default precision.
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Increasing the precision beyond machine precision gives all the roots correctly.
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Here NSolve gives the solutions of an algebraic equation.
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This finds the intersection of a pair of parametrized curves.
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