Tìm GTNN: 2xmũ2 -x -5 4xmũ2 + 4x -1 7xmũ2 – x -15 16/10/2021 Bởi Athena Tìm GTNN: 2xmũ2 -x -5 4xmũ2 + 4x -1 7xmũ2 – x -15
2×^2>-×>-5
4×^2>-1>-4×
7×^2>-×>-15