Ngoc Giang N, Huyen Trang P, Thi Nga N, Loc Thuan H, Vu Linh Dan M. INTEGRATING MATHEMATICS AND ECONOMICS WITH THE SUPPORT OF GEOGEBRA SOFTWARE IN TEACHING THE SYSTEM OF FIRST-ORDER INEQUALITIES WITH TWO UNKNOWNS AT THE HIGH SCHOOL LEVEL. HNUE JoES [Internet]. 2024 Dec. 27 [cited 2026 Jul. 12];69(5B):191-200. Available from: https://hnuejs.edu.vn/es/article/view/720