Bonjour !
Réduire les expressions suivantes :
a.12x - y + 2
b.7y+12 - 13y
c.10 - 8d + 3
d. 8 - x + x² + 5x
e. 3t - 12 t + t² - 7
f. a² + b - a + 3b

Développer et réduire les expressions suivantes :
A = 11 + 2 ( x - 6 ) + 4 ( - 3x - 6)
B= - 2(x - 5 ) - 3 ( 7 - 4x)
C= 8 + 2y - 5 (2y - 6 ) + 4
D = - 7y - 4 (3y - 6 ) + 3 + 2 ( 3y - 7)
E = - 5z + 5z ( z - 3) - 7 (6 - 8z )
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