How Do You Integrate the Square Root of a Polynomial?

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SUMMARY

The discussion focuses on integrating the square root of a polynomial, specifically the integral \(\int\sqrt{4x^{4}+x^{2}}dx\). The user suggests using substitution with \(u = 4x^{2}+1\) after simplifying the expression by factoring out \(x^{2}\) from the square root. The proposed derivative transformation leads to \(\frac{1}{8}\int\sqrt{4x^{2}+1}(8x)dx\), indicating a methodical approach to solving the integral through substitution.

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  • Understanding of polynomial functions and their properties
  • Knowledge of integral calculus, specifically integration techniques
  • Familiarity with substitution methods in calculus
  • Ability to manipulate algebraic expressions under square roots
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Students studying calculus, particularly those focusing on integration techniques, as well as educators looking for examples of polynomial integration methods.

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Homework Statement


This should be an easy one but I'm having a brainfart...


Homework Equations


\int\sqrt{4x^{4}+x^{2}}dx


The Attempt at a Solution


Do you take an x2 through the square root? From there you'd do this to get the derivative if the inside...I think...

\frac{1}{8}\int\sqrt{4x^{2}+1}(8x)dx

A walkthough would be appreciated.
 
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That's good. Now use substitution with u = 4x2+1
 

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