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Sagot :

INEQUATION

Bonsoir,

Développer:

A=4-(6x +12)= 4-6x-12= -6x-8

B = -(8x - 15) - 6= -8x+15-6= -8x+9

C = 13x - (-7x+3x²) - 4= 13x+7x-3x²-4= -3x²+20x-4

D = 6x²-4-(7x-8+9x²)= 6x²-4-7x+8-9x²= -3x²-7x+4

E = 2x² - (x + 4) − (x² + 4x) −5= 2x²-x-4-x²-4x-5= x²-5x-9

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