I have no idea why the homework is telling me I'm getting the wrong answer.. I'm following exactly how they did it in the book.. Let me know what you guys get
Evaluate the indefinite integral:
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Thats exactly what TKHunny has said in post number 2.
Isn't your book following the substution method?
let $\displaystyle u = 2x+9 \implies du = 2 dx \implies dx=\frac{du}{2}$
now your integral becomes:
$\displaystyle \int (2x+9)^5 dx = \int u^5 \frac{du}{2} = \frac{1}{2} \int u^5 du$
now integrate, and substitute $\displaystyle u=2x+9$ after your integration is complete!