Bonjour,
Factoriser:
a) (2x-3)(24x-3) + (2x-3)(-22x+5)
(2x-3)(24x-3-22x+5)
(2x-3)(2x+2)
2(2x-3)(x+1)
b) (15x+7)(3-x)+(12x+5)(15x+7)
(15x+7)(3-x+12x+5)
(15x+7)(11x+8)
c) (7x-26) (11x+8) + (7x-26) (12x+4)
(7x-26)(11x+8+12x+4)
(7x-26)(23x+12)
d) (13t+5)(-5t+2) - (8t-15) (13t+5)
(13t+5)(-5t+2-8t+15)
(13t+5)(-13t+17)
- (13t+5)(13t-17)
