bonjour
(x+2) X( 4x+3) + (x+2) (2x+4 )
= ( x + 2) ( 4 x + 3 + 2 x + 4 )
= ( x + 2) ( 6 x + 7 )
(2x+5) X (2x+ 3) +(x+1) X (5 + 2x )
= ( 2 x + 5) ( ( 2 x + 3 + x + 1 )
= ( 2 x + 5 ) ( 3 x + 4 )
(2x + 4) (x-5) + (x - 5) ( 3x - 6 )
= ( x - 5) ( 2 x + 4 + 3 x - 6 )
= ( x - 5 ) ( 5 x - 2 )
( 2x + 3) ( x + 2 ) + ( x + 2 ) ^ 2
= ( x + 2 ) ( 2 x + 3 + x + 2 )
= ( x + 2) ( 3 x + 5 )