Quintic and Higher Degree Polynomial Equations

  • #1
Pikkugnome
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TL;DR Summary
Formula for roots of higher degree polynomials.
What's the root formula for fifth and higher degree polynomial equations, which have roots in radicals?
 
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  • #2
Pikkugnome said:
TL;DR Summary: Formula for roots of higher degree polynomials.

What's the root formula for fifth and higher degree polynomial equations, which have roots in radicals?
There are none for the general case, meaning, it has been proven that there cannot be such solutions.

I doubt that the class of polynomials of a certain degree higher than four that do have radical solutions can be described in a way that allows the listing of their roots. You can construct such polynomials by multiplying terms ##x-x_k ## but that won't exhaust these classes.
 
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  • #3
Only certain quintic polynomials are solvable. See this. It is related to Galois theory, which I know nothing about. I think that the higher degree polynomials are even more complicated. People usually resort to numeric algorithms for fourth degree and higher polynomials.
 
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What is a quintic polynomial equation?

A quintic polynomial equation is a polynomial equation of degree 5. This means that the highest power of the variable in the equation is 5.

Can quintic polynomial equations always be solved algebraically?

No, not all quintic polynomial equations can be solved algebraically using radicals. This is known as the Abel-Ruffini theorem, which states that there is no general algebraic solution for polynomial equations of degree 5 or higher.

How can quintic polynomial equations be solved?

Quintic polynomial equations can be solved using numerical methods such as Newton's method, bisection method, or other iterative techniques. These methods approximate the solutions to the equation.

What are the properties of quintic and higher degree polynomial equations?

Quintic and higher degree polynomial equations can have multiple roots, complex roots, or real roots. They may have multiple turning points or inflection points, and their graphs can exhibit various shapes and behaviors.

Are quintic and higher degree polynomial equations used in real-world applications?

Yes, quintic and higher degree polynomial equations are used in various fields such as physics, engineering, economics, and computer science to model complex systems and phenomena. They are also used in cryptography and data analysis.

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