MOMOBG94
Answered


B = 9 (14-7y)
D = 4z (5z +9y)
C=-3(-7-4b)
D=4z(5z+9y)
Bonsoir pouvez vous m aider pour ces calculs​

Sagot :

Bonjour,

B = 9(14 - 7y)

B = 9 * 14 + 9 * (-7y)

B = 126 - 63y

B = - 63y + 126

C = -3(-7 - 4b)

C = -3 * (-7) - 3 * (-4b)

C = 21 + 12b

C = 12b + 21

D = 4z(5z + 9y)

D = 4z * 5z + 4z * 9z

D = 20z² + 36zy