Mathématiques

Question

6 eme fois je publie plizzzz

Factoriser :
A = (x + 2)(x + 1) + ( x + 2) (7x - 5)
B = (x + 1) (2x - 3) - (x + 1)(5x + 1)
C = (2x +1)² + (2x + 1)(x + 3)
D = (3 + x) ( 5x + 2) - ( 3 + x)²
E = (2x - 3)(3x + 5) + (3x + 5)

2 Réponse

  • A = (x + 2)(x + 1) + ( x + 2) (7x - 5)

    (x+2)(x+1+7x-5)

    (x+2)(8x-4)


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

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

    (x+1)(-3x-4)


     C = (2x +1)² + (2x + 1)(x + 3)

    (2x+1)(2x+1+x+3)

    (2x+1)(3x+4)


     D = (3 + x) ( 5x + 2) - ( 3 + x)²

    (3+x)(5x+2-3-x)

    (3+x)(4x-1)


    E = (2x - 3)(3x + 5) + (3x + 5)

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

    (3x+5)(2x-2)

  • A= (x+2) (x+1+7x-5) = (X+2) (8x-4)
    B= (x+1) (2x-3-5x-1)=(x+1) (-3x-4)
    C=(2x+1) (2x+1+x+3)=(2x+1) (3x+4)
    .......


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