Bonjour,
il te suffit de chercher un facteur commun dans les deux termes
A = 7x - 14
A = 7 * x - 7 * 2 (ici le facteur commun est 7)
A = 7 (x - 2)
B = 12t + 6
B = 6 * 2t + 6 * 1
B = 6 (2t + 1)
C = a² + 3a
C = a * a + 3 * a
C = a (a + 3)
D = 4b² - 12
D = 4 * b² - 4 * 3
D = 4 (b² - 3)
E = 2t² - 3t
E = t * 2t - t * 3
E = t (2t - 3)
F = 4x² + 20x
F = 4x * x + 20 * x
F = 4x (x + 5)
G = 5x² + 25x
G = 5x * x + 5x * 5
G = 5x (x + 5)
H = -10 - 16a
H = - 2 * 5 + (-2) * 8a
H = (-2) (5 + 8a)
