Réponse:
5(5x-6)
(7x+3) ( 7x+3)+(7x+3)(-8x+10)
(7x+3)[(7x+3)+(-8x+10)]
(7x+3)(7x+3+(-8x)+10)
(7x+3)(7x+(-8x)+3+10)
(7x+3)(-1x+13)
(2x-1)[(3x+5)+(2x-4)]
(2x-1)(3x+5+2x-4)
(2x-1)(3x+2x+5-4)
(2x-1)(5x+1)
(2x+3)[(3x-5)-(-7+8x)]
(2x+3)(3x-5+(-7)+8x)
(2x+3)(3x+8x-5+(-7)
(2x+3)(11x+2)