Bonjour,
A = 5x(x + 3) + 9x²(x + 3)
(x+3)( 5x +9x²)
B = (2 - x) x 4x - 7(2 - x)
(2-x)( 4x-7)
C = 8(5 - x) + (5-x )
(5-x) ( 8+ 1) = (5-x)*9
D = (2x + 3) + x(2x + 3)
(2x+3) ( 1 +x)
Réponse :
bonjour
A = 5x(x + 3) + 9x2(x + 3)
A = ( x+ 3 ) ( 5 x + 9 x² )
B = (2 - x) x 4x - 7(2 - x)
B = ( 2 - x ) ( 4 x - 7 )
C = 8(5 - x) + 5-X
C = 8 ( 5 - x ) + 1 ( 5 - x )
c = ( 5 - x ) ( 8 + 1 )
C = 9 ( 5 - x )
D = 2x + 3 + x(2x + 3)
D = 1 ( 2 x + 3 ) + x ( 2 x + 3 )
D = ( 2 x + 3 ) ( 1 + x )
Explications étape par étape
