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KIKIKINOU2005
Answered

Bonjour je suis en seconde pouvais vous m'aider
Développer, réduire et ordonner les expressions sui vantes.

a) (3x - 2)(5 - x) - 4x * (x + 6) c) 2(x + 3) * (5x + 1)

b) - 3(2 - 2x) * (6 - 2x) d) - 2(x ^ 2 + 1) * (x - 2)

Sagot :

Réponse :

Bonsoir,

A = (3x - 2)(5 - x) - 4x * (x + 6)

  = (3 * x - 2) * (5 - x) - 4 * x * (x + 6)

  = -10 -7x -7x²

B = -3(2 - 2x) * (6 - 2x)

  = -3 * (2 - 2 * x) * (6 - 2 * x)

  = -36 + 48x - 12x²

C = 2(x + 3) * (5x + 1)

  = 2 * (5 * x + 1) * (x + 3)

  = 6 + 32x + 10x²

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

   = -2(x³ + x - 2x² - 2)

    = -2x³ + 4x² - 2x + 4

Bon courage ^-^

INEQUATION

Bonsoir,

Développer:

a) (3x - 2)(5 - x) - 4x * (x + 6)

15x-10-3x²+2x-4x²-24x

-7x²-7x-10

b) - 3(2 - 2x) * (6 - 2x)

-3(12-12x-4x+4x²)

-3(4x²-16x+12)

-12x²+48x-36

c) 2(x + 3) * (5x + 1)

2(5x²+15x+x+3)

2(5x²+16x+3)

10x²+32x+6

d) - 2(x ^ 2 + 1) * (x - 2)

-2(x³+x-2x²-2)

-2x³+4x²-2x+4

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