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$\int\left(3x+4b\right)\left(3x-4b\right)db$
Learn how to solve integral calculus problems step by step online. Find the integral of (3x+4b)(3x-4b). Find the integral. Rewrite the integrand \left(3x+4b\right)\left(3x-4b\right) in expanded form. Expand the integral \int\left(9x^2-16b^2\right)db into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int9x^2db results in: 3x^{3}.