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Sagot :

Réponse :

Bonjour

Explications étape par étape

Merci serait sympa !

A = (3x+4)²

A = 9x² +24x +16

B = (x-3)(x+3)

B = x² -9

C = (5x-2)²

C = 25x² -20x +4

D = (1+2x)(1-2x)

D = 1 -4x²

E= (x-1)(2-x)+ (2x+1)²

E = 2x -x² -2 +x + ( 4x² +4x +1)

E = -x² +3x -2 +4x² +4x +1

E = 3x² +7x -1

F= (3x+2)²- (3-x)(x-2)

F = 6x² +12x +4 - (3x -6 -x² +2x)

F = 6x² +12x +4 - ( +5x -6 -x²)

F = 6x² +12x +4 -5x +6 +x²

F = 7x² +7x +10

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