Bonsoir,
Développer et réduire :
A= 7y(2-9y)
A = 14y - 63y²
B=-2y(5-y)
B = - 10y + 2y²
C=(z+4)(z+3)
C = z² + 3z + 4z + 12
C = z² + 7z + 12
D=(z+3)(2z+8)
D = 2z² + 8z + 6z + 24
D = 2z² + 14z + 24
E=(3t + 4)(5-6t)
E = 15t - 18t² + 20 - 24t
E = - 18t² - 9t + 20
F=(-7t+8)(3-5t)
F = - 21t + 35t² + 24 - 40t
F = 35t² - 61t + 24
Factoriser
G=18a-12
G = 6 (3a - 2)
H=21b²-7b
H = 7b (3b - 1)
I= 2(3+c)+4c(3+c)
I = 2 (3 + c) (2c + 1)
J= 2d(4-d)²+8(4-d)
J = 2 (d - 4) (d² - 4d - 4).
