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Sagot :

LOUBIE
1) 6x-12-8x+5=-2x-7

2) -12x^2+6x+28x-14-(6x^2+2x)
= -12x^2+6x+28x-14-6x^2-2x
= -12x^2-6x^2+6x+28x-2x-14
= -18x^2+32x-14

3) 35x^2-7x-10x+2-(-6x^2+12x+6x-12)
= 35x^2-7x-10x+2+6x^2-12x-6x+12
= 35x^2+6x^2-7x-10x-12x-6x+2+12
= 41x^2-35x+14

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