Bonjour,
[tex]6 {x}^{2} - 5x = 6x \times x - 5 \times x = (6x - 5)x[/tex]
[tex]49 {y}^{2} + 14y = 7y \times 7y + 7y \times 2 = 7y(7y + 2)[/tex]
[tex]9 {n}^{2} - 6n = 3n \times 3n - 2 \times 3n = 3n(3n - 2)[/tex]
[tex]8 {t}^{2} + 6t + 2 = 2 \times 4t {}^{2} + 2 \times 3t + 2 \times 1 = 2(4 {t}^{2} + 3t + 1)[/tex]
