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bonjour
Exercice 1 : Développe et réduis chaque expression:
A = (b + 4)(b + 3)
C = (3a+4)(5 - 6a)
B = (y + 3)(2y + 8)
D = (-7t + 8)(3-5t)
Merci​

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JEBAELARA

Réponse:

a=(b+4)(b+3)

=b^2+7b+12

c=(3a+4)(5-6a)

=15a-18a^×+20-24a

=-18a^2 +20 -9a

b=(y+3)(2y+8)

=2y^2+8y+6y+24

=2y^2+24+14y

d=(-7t +8)(3-5t)

=-21t +35t^2 +24 -40t

=-61t +24 +35t^2

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