Bonjour
A = ( x + 1 )² - x - 1
A = ( x + 1 )² - ( x + 1 )
A = ( x + 1 ) ( x + 1 - 1)
A = x ( x + 1 )
B = ( 2 x - 3 ) ² + 6 x - 9
= ( 2 x - 3 )² + 3 ( 2 x - 3 )
= ( 2 x - 3 ) ( 2 x - 3 + 3)
= 2 x ( 2 x - 3 )
C ) ( 2 x - 1 ) ( x+ 5 ) + ( 1 - 2 x ) ( 3 - 2 x )
= ( 2 x - 1 ) ( x + 5 ) - 1 ( - 1 + 2 x) ( 3 - 2 x )
= ( 2 x - 1 ) ( x + 5 - 3 + 2 x )
= ( 2 x - 1 ) ( 3 x + 2 )
continue
