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Instagram: /gentemiga In this video, I solve 7 math questions (8 to 14) from the final recovery for the 3rd year of high school, focusing on analytical geometry. I cover everything from the construction of matrices and basic operations, such as addition, subtraction, and multiplication, to the calculation of determinants and resolution of linear systems. Topics covered: Question 8: Construction of matrices A and B based on rules, calculation of the product A x B, subtraction of matrices, transposed matrix, and determinant. Question 9: Calculation of determinants with algebraic elements, resolution of a linear system to find values of x, y, and z. Question 10: Calculation of the square of a matrix (A x A). Question 11: Definition of a matrix as twice another (B = 2A), calculation of determinants of matrices and their transposes. Question 12: Multiplication of matrices in both orders (M x N and N x M), sum of the resulting matrices. Question 13: Calculation of determinants using properties, solving a system of equations to find values of x and y. Question 14: Analytical geometry: intersection between graphs, equation of a straight line, angular and linear coefficient. Objective: The objective is to help students review the content of matrices and analytical geometry, preparing them for the final recovery. #mathematics #onlineclass #schoolreinforcement #elementaryII #highschool #difficultyinmathematics #recovery #helpinmathematics #live #live Discord Channel / discord Telegram Channel https://t.me/matematicacomgenteamiga