👤

salut aidez moi svp
Développer réduire et ordonner les expressions suivantes:

A)[tex]-4(15 x+1) ( x-1)+(- x-1)(-2 x+1)[/tex]
B)[tex]-3( \frac{1}{2} x + \frac{1}{2} )(3 x- \frac{5}{6} )-( \frac{7}{2} x- \frac{1}{3} )( x+3)[/tex]
C)[tex]- \frac{1}{2} ( x^{2} -2 x+1)(- x+1)-( x-5)(7 x- \frac{7}{4} )[/tex]
D)[tex]-2 x^{2} (-3 x^{2} -1)-(2 x^{3} + \frac{2}{5} )( x+1)[/tex]
E)[tex](4 x+2)(4 x-2)+( x-1)( x+1)[/tex]
F)[tex]-( \frac{1}{2} x+1)( \frac{1}{2} x-1)- \frac{1}{3} (3 x+2)(3 x-2)[/tex]

MERCI D'AVANCE POUR L'AIDE


Répondre :

Bonsoir,

A)
-4(15x + 1)(x - 1)+(-x - 1)(-2x + 1)
-4(15x^2 - 15x + x - 1) + 2x^2 - x + 2x - 1
-60x^2 + 60x - 4x + 4 + 2x^2 + x - 1
-58x^2 + 57x + 3

B)
-3(1/2x + 1/2)(3x - 5/6) - (7/2x - 1/3)(x + 3)

-3(3/2x^2 - 5/10x + 3/2x - 5/12) - (7/2x^2 + 21/2x - 1/3x - 1)

-9/2x^2 + 3/2x - 9/2x + 5/4 - 7/2x^2 - 21/2x + 1/3x + 1

-16/2x^2 + 15/2x + 1/3x + 1
-8x^2 + 45/6x + 2/6x + 1
-8x^2 + 47/6x + 1

C)
-1/2(x^2 - 2x + 1)(-x + 1) - (x - 5)(7x - 7/4)

-1/2(-x^3 + x^2 + 2x^2 - 2x - x + 1) - (7x^2 - 7/4x - 35x + 35/4)

1/2x^3 - 1/2x^2 - x^2 + x + 1/2x - 1/2 - 7x^2 + 7/4x + 35x - 35/4

1/2x^3 + 11/2x^2 + 36x + 2/4x + 7/4x-1/2
1/2x^3 + 11/2x^2 + 144/4x + 9/4x - 1/2
1/2x^3 + 11/2x^2 + 153/4x - 1/2
1/2x^3 + 11/2x^2 + 153/4x - 1/2

D)
-2x^2(-3x^2 - 1) - (2x^3 + 2/5)(x + 1)
6x^4 + 2x^2 - (2x^4 + 2x^3 + 2/5x + 2/5x)
6x^4 - 2x^4 - 2x^3 - 2/5x - 2/5x
4x^4 - 2x^3

E)
(4x + 2)(4x - 2). + (x - 1)(x + 1)
16x^2 - 4 + x^2 - 1

F)
-(1/2x + 1)(1/2x - 1) - 1/3(3x + 2)(3x - 2)
-(1/4x^2 - 1) - (1/3(9x^2 - 4))
-1/4x^2 + 1 - 3x^2 + 4/3