résoudre les équations suivantes : a) (2x + 1)(3x – 7) = 0
d) (x + 1)(-4 + 5x) + 2x(-4 + 5x) = 0 f) (x + 2)2 + 5(x + 2) = 0
h) (2x – 3 )(x – 7) – (x – 7)(5x + 4) = 0
b) (-x – 11)(-5x + 4) = 0
c) (5x + 3)(9 – 2x) = 0
e) 4x(-7x + 3) + 4x(5x – 4) = 0
g) (-4x + 3)(7x – 1) + (-4x + 3)2 = 0
i) (-2 – 5x)2 – (3 + 11x)(-2 – 5x) = 0