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$\int\left(2a+3b\right)^2db$
Learn how to solve one-variable linear inequalities problems step by step online. Integrate the function (2a+3b)^2. Find the integral. Rewrite the integrand \left(2a+3b\right)^2 in expanded form. Expand the integral \int\left(4a^{2}+12ab+9b^{2}\right)db into 3 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int4a^{2}db results in: \frac{4}{3}a^{3}.