Квадратные уравнения
This presentation is about quadratic equations for 9th grade students. It starts with a warm-up exercise involving square roots and basic arithmetic. Then, it explains the definition of a quadratic equation in the form ax² + bx + c = 0, identifying the coefficients a, b, and c. It also differentiates between complete and incomplete quadratic equations and provides examples of each. The presentation further explains the difference between reduced and irreducible quadratic equations. It includes examples with step-by-step solutions, such as x² = d and x² = 64. There is a crossword puzzle to test understanding of the concepts. Finally, it assigns homework exercises. The purpose is to introduce students to quadratic equations, their components, and how to solve simple forms.