1 Pour réviser Développer puis simplifier les expressions suivantes.
A = 3x(x + 1) + 2x =
B = (x + 7)(x - 2) =
C= (5x + 6) (2x - 1) = - - - + -
D = (x + 2)(x - 5) + (x − 3)(x + 4) =
E = 3(x – a) + a(3 - x) + x(a – 3) =
F = (x - 6)(x + 1) - (x + 6)(x - 1) = -
