Equação do segundo grau: um estudo das organizações praxeológicas em livros didáticos do 9º ano do Ensino Fundamental II

Abstract

This research has the objective to investigate how they are presented to the equations of the second degree in textbooks of year 9 of elementary school II. We know that this issue has been worked in teaching institution in the entire National Territory, contemplated in the National Curricular Parameters of Mathematics, published in 1998 and also in the Curriculum Proposal for the teaching of Mathematics, edited in 1997. By this importance, and by perceiving the need of this theme in the construction of the student's knowledge, we develop this research based on analyzes of textbooks rests on research done in Mathematics Education. Our theoretical framework is based on Anthropological Theory of Didactic, developed by Yves Chevallard, of France, from the 1990s. The researches of Lins and Gimenez (1997) about meaningful learning of algebra also contributed to the drafting of our work. Our research has qualitative nature , because it is a review of textbooks. It also assumes a documentary character. Thus, this work responds to the following question: is it possible to solve equations of the second degree of various forms? We can realize, at the end of the analyzes of textbooks, lack of tasks that really help the student in their learning process and also the lack of various techniques in solving the tasks