NGOC GIANG, Nguyen; HUYEN TRANG, Pham; THI NGA, Nguyen; LOC THUAN, Ho; VU LINH DAN, Mai. 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. Journal of Science Educational Science, [S. l.], v. 69, n. 5B, p. 191–200, 2024. DOI: 10.18173/2354-1075.2024-0147. Disponível em: https://hnuejs.edu.vn/es/article/view/720. Acesso em: 5 dec. 2025.