Réponse :
Explications étape par étape
Bonsoir
Calculer :
A = 35 x 102
A = (30 + 5) x (100 + 2)
A = 30 x 100 + 30 x 2 + 5 x 100 + 5 x 2
A = 3000 + 60 + 500 + 10
A = 3570
B = 45 x 98
B = (50 - 5) x (100 - 2)
B = 50 x 100 - 50 x 2 - 5 x 100 + 5 x 2
B = 5000 - 100 - 500 + 10
B = 4410
Factoriser :
A = 2x + 4
A = 2 * x + 2 * 2
A = 2(x + 2)
B = 3x^2 + 5x
B = x * 3x + x * 5
B = x(3x + 5)
C = 5x - 5
C = 5 * x + 5 * (-1)
C = 5(x - 1)
