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$\int\left(\left(a+9\right)^2-2\left(a+9\right)\right)da$
Learn how to solve integral calculus problems step by step online. Integrate the function (a+9)^2-2(a+9). Find the integral. Rewrite the expression \left(a+9\right)^2-2\left(a+9\right) inside the integral in factored form. We can solve the integral \int\left(a+9\right)\left(a+7\right)da by applying integration by parts method to calculate the integral of the product of two functions, using the following formula. First, identify u and calculate du.