bonjour
A= (3x - 5)(x + 1) + (x + 1)(7x + 3)
( x + 1 ) ( 3 x - 5 + 7 x + 3 )
= ( x + 1 ) ( 10 x - 2 )
B= 3x(2 + x) + 4(2 + x)
( 2 + x ) ( 3 x + 4 )
C=(5x + 2)(2x - 1) - (5x + 2)(5 - x)
= ( 5 x + 2 ) ( 2 x - 1 - 5 + x )
= ( 5 x + 2 ) ( 3 x - 6 )
= 3 ( 5 x + 3 ) ( x - 2 )
D=(2x - 1)(x - 1) - 2(x - 1)
( x - 1 ) ( 2 x - 1 - 2 )
= ( x - 1 ) ( 2 x - 3 )
E=(3x + 2) + (x + 4)(3x + 2)
( 3 x + 2 ) ( x + 4 + 1 )
( 3 x + 2 ) ( x + 5 )
