How to Integrate Fractions with Substitution?

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To integrate the expression (5x-6)²/x^(1/2), substitution is a common approach, but it requires careful setup. Initially, the attempt at substitution with u=5x-6 was not effective due to improper setup. Factoring the numerator or expanding it into three terms can simplify the integration process. Ultimately, expanding the numerator made the integration straightforward. The discussion highlights the importance of choosing the right method for integration.
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Homework Statement


Integrate: (5x-6)2/x1/2


Homework Equations





The Attempt at a Solution


I tried substitution, letting u=5x-6 and then plugging that in but realized that I didn't have the proper set up for that. I'm unsure how to go about this; should I factor out the numerator or would that only make things more difficult?
 
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Multiply (5x-6)^2 out and separate the equation into three terms.
 
Expand the numerator and then it should be easy.
 
It was very easy indeed. thanks.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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