bjr urgent factorise puis reduis C=(2x-1)(x-5)+(3x+7)(x-5) D=(2x+5)(x-3)+(2x+5)(-3x+1) E=(3x+7)(2x-9)-(3x+7)(5x-7) F=(-3x+4)(3x-8)-(-3x+4)(7x+2) G=(8y+3)(5y+7)-

bonjour,

C=(2x-1)(x-5)+(3x+7)(x-5)
(x-5)(2x-1+3x+7)
(x-5)(5x+6)

D=(2x+5)(x-3)+(2x+5)(-3x+1)
(2x+5)(x-3-3x+1)
(2x+5)(-2x-2)
-2(2x+5)(x+1)

E=(3x+7)(2x-9)-(3x+7)(5x-7)
(3x+7)(2x-9-5x+7)
(3x+7)(-3x-2)

F=(-3x+4)(3x-8)-(-3x+4)(7x+2)
(-3x+4)(3x-8-7x-2)
(-3x+4)(-4x-10)
-2(-3x+4)(2x+5)

G=(8y+3)(5y+7)-3(8y+3)(2y-1)
(8y+3)(5y+7-6y+3)
(8y+3)(-y+10)

bonsoir

c= ( x -5) ( 2 x - 1 + 3 x + 7)
c = ( x -5) ( 5 x + 6)

d = (2 x + 5) ( x - 3 - 3 x + 1)
d = ( 2 x + 5) ( - 2 x - 2)

e = ( 3 x + 7) ( 2 x - 9 - 5 x + 7)
e = ( 3 x + 7) ( - 3 x - 2)

f = ( - 3 x + 4) ( 3 x - 8 - 7 x - 2)
f = ( - 3 x + 4) ( - 4 x - 10)

g = ( 8 y + 3) ( 5 y + 7 - 6 y + 3)
g = ( 8 y + 3) ( - y + 10)