Sagot :
bonjour
1. a(x)=13(x+2)+5x(x+2)
( x + 2 ) ( 13 + 5 x )
2. b(x)=3x(7-x)-8x(7-x)
( 7 - x ) ( 3 x - 8 x ) = - 5 x ( 7 - x )
3.c (x)=(x-3)(2x+1)+7(2x+1)
( 2 x + 1 ) ( x - 3 + 7 ) = ( 2 x + 1 ) ( x + 4 )
4. d(x)=(x+1)(x+2)-5(2+x)
( x + 2 ) ( x + 1 - 5 ) = ( x + 2 ) ( x - 4 )
5. e(x)= (x+1)(3x-2)-(x+2)(3x-2)
= ( 3 x - 2 ) ( x + 1 - x - 2 ) = ( 3 x - 2 ) ( - 1 )
Bonjour
1. a(x)=13(x+2)+5x(x+2)
(x+2) ( 13 +5x)
2. b(x)=3x(7-x)-8x(7-x)
(7-x) ( 3x -8x)
= (7-x) ( -5x)
3.c (x)=(x-3)(2x+1)+7(2x+1)
(2x+1) ( x-3 +7)
= (2x+1) ( x+4)
4. d(x)=(x+1)(x+2)-5(2+x)
(x+2) ( x+1 -5)
=(x+2) (x -4)
5. e(x)= (x+1)(3x-2)-(x+2)(3x-2)
(3x-2) ( x+1 -x-2)
= (3x-2) ( -1)