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Réponse :

Explications étape par étape

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Factoriser :

A = 3x^2 - 12x

A = 3x * x - 3x * 4

A = 3x(x - 4)

B = 7x^2 - 21x + 28

B = 7(x^2 - 3x + 4)

C = 5x^2 - 5

C = 5(x^2 - 1)

D = (x + 3)(4x - 2) + (x + 3)(3x + 1)

D = (x + 3)(4x - 2 + 3x + 1)

D = (x + 3)(7x - 1)

E = (x + 4)(x - 5) - 2(x - 5)

E = (x - 5)(x + 4 - 2)

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

F = (x - 2)(3x - 1) - (3x - 1)^2

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

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

G = (8x + 1)(-7x + 8) - 7x + 8

G = (-7x + 8)(8x + 1 + 1)

G = (-7x + 8)(8x + 2)

G = 2(-7x + 8)(4x + 1)

H = (4x - 6)(8x - 9) - (3 - 2x)

H = 2(2x - 3)(8x - 9) - 3 + 2x

H = (2x - 3)[2(8x - 9) + 1]

H = (2x - 3)(16x - 18 + 1)

H = (2x - 3)(16x - 17)

I = x^2 - 4

I = (x - 2)(x + 2)

J = 9x^2 - 25

J = (3x - 5)(3x + 5)

K = (x - 3)^2 - 16

K = (x - 3 - 4)(x - 3 + 4)

K = (x - 7)(x + 1)

L = (3x - 1)^2 - (5 - x)^2

L = (3x - 1 - 5 + x)(3x - 1 + 5 - x)

L = (4x - 6)(2x + 4)

L = 2(2x - 3) * 2(x + 2)

L = 4(2x - 3)(x + 2)

M = 9(x - 1)^2 - (4 - 5x)^2

M = [3(x - 1) - 4 + 5x][3(x - 1) + 4 - 5x]

M = (3x - 3 - 4 + 5x)(3x - 3 + 4 - 5x)

M = (8x - 7)(-2x + 1)

N = x^2 - 2x + 1

N = (x - 1)^2

O = 16 - 24x + 9x^2

O = (3x - 4)^2

P = x^2 - x + 1/4

P = (x - 1/2)^2