A = a - 7a = ? b = 7x (x+10) = ?

c = 2 ( x - 7 ) + 5 ( x + 4 ) = ? Développer svp.

d = ( 2x - 1 ) (3x + 2 ) = ? Développer svp.

e = 3x² + 5x + xy = ?


Combien de minutes faut- il pour parcourir 8 km à la vitesse de 40 kmh-1?
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