Bonjour ! Exercice 1 développer et réduire :
A = x ( x + 4 )
B = 7y(2 - 9y )
C = - 2y (5 - y )
D = (9 - 3r) x 4t

Exercice 5 Factoriser les expressions :
A = 7x + 14
B= 3x² - 2x
C= 5x - 5

Exercice 6 Supprimer les parentheses et réduire
A = 3 - (2x + 3 ) + 5x - 1
B = 5 - (2x - 8) + (5x + 1)

Merci d'avance
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