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$\int\left(\ln\left(3x\right)-\ln\left(x+9\right)\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral of ln(3x)-ln(x+9). Find the integral. Expand the integral \int\left(\ln\left(3x\right)-\ln\left(x+9\right)\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. Multiply the single term \frac{1}{3} by each term of the polynomial \left(3x\ln\left(3x\right)-3x\right). The integral \int\ln\left(3x\right)dx results in: x\ln\left(3x\right)-x.