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Sagot :

1) x^2-2x+12) 4/9x^2 +4/3x+13)3x^2-6x+32)(x^2-(1/2)^2)
4)x/x+2
5)1-x/x
6) x^2 + x^2+x+x+1/x+1(x)  =2x^2+2x+1/x^2+xvoila :) detail le ^ ca veut exposant :OK:

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