bonjour
A = 2x (x - 5) + 7(x - 5)
- A = ( x - 5 ) ( 2 x + 7 )
B = (2 x + 5)(x – 3) + (2x + 5) + (2x + 5)(-3x + 1)
b = ( 2 x + 5 ) ( x - 3 - 3 x + 1 )
B = ( 2 x + 5 ) ( - 2 x - 2 )
(3y + 7)(2y - 9) + (3y + 7)(5y - 7)
= ( 3 y + 7 ) ( 2 y - 9 + 5 y - 7 )
= ( 3 y + 7 ) ( 7 y - 16 )