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In general, when you want to obtain the square of a polynomial, regardless of the number of terms it has, you must add the squares of each individual term plus twice the sum of the products of each possible pair of terms. In this video we will explain how to obtain the square of a trinomial, and the same rule must be used for polynomials with four or more terms. If you want to continue learning in a practical and simple way, don't forget to subscribe and activate the notification bell ???? ???? Our social networks ???? Facebook: / eduquevideos