Réponse :

Explications étape par étape

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S = 12x - x^2 - (3x)^2 + 4x - 4 + 6x - 7

S = 12x - x^2 - 9x^2 + 4x + 6x - 4 - 7

S = -10x^2 + 22x - 11

E = 4(-5x + 8)

E = -20x + 32

H = (4x + 3)(5 - 2x)

H = 20x - 8x^2 + 15 - 6x

H = -8x^2 + 14x + 15

N = 6x^7 + x^18 - 2x^3 + 4 - 5x^6 - 3x^3 + 8 - 7x^3

N = x^18 + 6x^7 - 5x^6 - 12x^3 + 12

A = (x - 3)^2

A = x^2 - 6x + 9

Z = (2x + 3)(2x - 3)

Z = (2x)^2 - 3^2

Z = 4x^2 - 9

O = (4x - 3)(5x - 8) - (x^2 + 2 - 3x)

O = 20x^2 - 32x - 15x + 24 - x^2 - 2 + 3x

O = 19x^2 - 44x + 22

S = (x + 3)^2 + (2x - 5)^2

S = x^2 + 6x + 9 + 4x^2 - 20x + 25

S = 5x^2 - 14x + 34