Réponse :
51)
A = a^2 + 3a
A = a * a + 3 * a
A = a(a + 3)B = 4b^2 - 12
B = 2 * 2b^2 - 2 * 6
B = 2(2b^2 - 6)
52 )
A = 2t^2 - 3t
A = t * 2t - t * 3
A = t(2t - 3)
B = 4x^2 + 20x
B = 4x * x + 4x * 5
B = 4x(x + 5)
53)
A = -5x^2 + 25x
A = 5x * -x + 5x * 5
A = 5x(-x + 5)
B = -10 - 16a
B = -2 * 5 - 2 * 8a
B = -2(5 + 8a)
Explications étape par étape
