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Sagot :

Réponse :

Bonjour

Explications étape par étape

Développement et factorisation

A = 3x (x +1) -4 (x +2)

A = 3x² +3x -4x -8

A = 3x² -x -8

B = (6x +1)²

B = 36x² +12x +1

C = (2x -1) et la suite !

Factorisation

A = 2x² -5x = x(2x -5)

B = (5x -2) (x -1) -3 (x-1)

B = ( x-1) (5x -2 +3)

B = (x -1)( 5x +1)

C = 5 (2x -1)² + (2x-1) (x incomplet !

D = 16x² -9

D = (4x -3)( 4x -3)

F = 9x² +30x +25 = (3x +5)²

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