NR, Yusuf Devan; ANGRAINI, Lilis Marina; WAHYUNI, Astri; WAHYUNI, Putri. Students’ Mathematical Problem-Solving Ability in Solving Quadratic Function Problems. Kognitif: Jurnal Riset HOTS Pendidikan Matematika, [S. l.], v. 6, n. 2, p. 486–497, 2026. DOI: 10.51574/kognitif.v6i2.3450. Disponível em: https://etdci.org/journal/kognitif/article/view/3450. Acesso em: 3 may. 2026.