Integrals using u substitution

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SUMMARY

The integral of the function 32x²/(2x+1)³ can be solved using the u-substitution method. The recommended substitution is u = 2x + 1, which simplifies the integral significantly. After substituting, x can be expressed as (u - 1)/2, allowing for the expansion of the numerator. This approach effectively prepares the integral for further simplification, including the use of partial fractions if necessary.

PREREQUISITES
  • Understanding of u-substitution in integral calculus
  • Familiarity with polynomial long division
  • Knowledge of partial fraction decomposition
  • Basic algebraic manipulation skills
NEXT STEPS
  • Practice u-substitution with various polynomial integrals
  • Learn about partial fraction decomposition techniques
  • Explore the application of polynomial long division in integration
  • Study advanced integration techniques, including integration by parts
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques, as well as educators seeking to enhance their teaching methods in integral calculus.

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Homework Statement



Using substitution, find the integral of 32x2/(2x+1)3

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The Attempt at a Solution



I initially tried plugging u in for 32x2 but that wouldn't work because it won't cancel out with the problem below it anyway. I'm pretty sure we are not expected to multiply the bottom function out, so how would I go about doing this?
 
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use partial fractions
 
Just use u=2x+1. You would have to do it anyway after partial fractions. So x=(u-1)/2. Then just expand the numerator.
 

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