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Bonjour j'ai du mal au calcul littéral

1. Factoriser l'expression D = 2x(3x+1)-8x

2. Factoriser l'expression E=(4x-5)(2x+1)+(4x-5)(-3x+9)

3. Factoriser l'expression F = (-2x-3)(5x-1)-(-2x-3)²

Sagot :

MAUDMARINE

Bonjour,

1. Factoriser l'expression

D = 2x(3x+1)-8x

D = 6x² + 2x - 8x

D = 6x² - 6x

D = 6x (x - 1)

2. Factoriser l'expression

E=(4x-5)(2x+1)+(4x-5)(-3x+9)

E = (4x - 5) (2x + 1 - 3x + 9)

E = (4x - 5) (- x + 10)

3. Factoriser l'expression

F = (-2x-3)(5x-1)-(-2x-3)²

F = (- 2x - 3) [(5x - 1) - (- 2x - 3)]

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

F = (- 2x - 3) (7x + 2)