Mathématiques

Question

Développer puis réduire les expressions suivantes.
A = 3(x-2)
B = -4(2x + 1)
C = -5x (-x + 2)
D = (3x - 2)²
E = (4x + 1)²
F = ( x + 3)( x - 1)
G = (2x - 1)(2x + 1)
H = (3x - 5)(-2x + 1)
I = 3(x - 2)( x + 5)
K = -2(x + 3)(2x-4)
L = 4(x - 3)²
M = ( x + 1)²-( 2x + 3)( x - 5)

1 Réponse

  • A = 3(x-2)
    A= 3x - 6

    B = -4(2x + 1)
    B= - 8x - 4

    C = -5x (-x + 2)
    C= 5x² - 10x

    D = (3x - 2)²
    D= 9x² - 12x + 4

    E = (4x + 1)²
    E= 16x² + 8x + 1

    F = ( x + 3)( x - 1)
    F= x² - x + 3x - 3
    F= x² + 2x - 3

    G = (2x - 1)(2x + 1)
    G= 4x² - 1

    H = (3x - 5)(-2x + 1)
    H= -6x² + 3x + 10x - 5
    H= - 6x² + 13x - 5

    I = 3(x - 2)( x + 5)
    I= (3x - 6)(x + 5)
    I= 3x² + 15x - 6x - 30
    I= 3x² + 9x - 30

    K = -2(x + 3)(2x-4)
    K= (- 2x - 6)(2x - 4)
    K= - 4x² + 8x - 12x + 24
    K= - 4x² - 4x + 24

    L = 4(x - 3)²
    L= 4(x² - 6x + 9)
    L= 4x² - 24x + 36

    M = ( x + 1)²-( 2x + 3)( x - 5)
    M= x² + 2x + 1 - (2x² - 10x + 3x - 15)
    M= x² + 2x + 1 - 2x² + 10x - 3x + 15
    M= - x² + 9x + 16

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