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$\left(2r+s\right)\left(2r-2t\right)$
Learn how to solve special products problems step by step online. \left( 2r + s \right)\left( 2r - 2t \right). Math interpretation of the question. We can multiply the polynomials \left(2r+s\right)\left(2r-2t\right) by using the FOIL method. The acronym F O I L stands for multiplying the terms in each bracket in the following order: First by First (F\times F), Outer by Outer (O\times O), Inner by Inner (I\times I), Last by Last (L\times L). Then, combine the four terms in a sum. Substitute the values of the products.