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Sagot :

Réponse:

Pour x=3

[tex]a = (2( 3) - 5) ^{2} \\ a =(6 - 5) ^{2} \\ a =1[/tex]

[tex]b = (4(3) ^{2} - 20(3) + 25) \\ b =36 - 60 + 25 \\ b =1[/tex]

[tex]c = 2(3)(2(3) - 3) \\ c = 6(6 - 3) \\c =18[/tex]

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