PENGGUNAAN MEDIA BLOK DIENNES DALAM MENYELESAIKAN PERSAMAAN KUADRAT DENGAN CARA MEMFAKTORKAN

Abstract

Mathematic topics in general and the topic of solving quadratic equations in particular, at schools, tend to be taught in an abstract way by teachers.This needs to be changed and developed into meaningful learning. Students can act and experience the concepts and facts of Mathematics. This paper is a descriptive-reflective study on the use of Diennes block media in solving a quadratic equation. Diennes blocks are geometric shapes in the form of squares with side lengths of x, rectangles of length x and width of 1, and unit squares measuring 1 × 1. Solving quadratic equations using Diennes blocks are the solution by factoring through composing activities. The existing Diennes blocks are such that they form a rectangular model as an expansion or narrowing of the size of the Diennes block with a value of x2. The results of the study show that the use of Diennes blocks is very helpful in getting the solution of a quadratic equation with various possibilities. The possibilities referred to include the form: ax2 + bx + c = 0, ax2 - bx + c = 0, ax2 + bx - c = 0, and ax2 - bx - c = 0.