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Sagot :

Explications étape par étape:

[tex]x \times x \times x = { \times }^{3} [/tex]

  1. [tex]x \times x \times x + 3 = {x}^{3} + 3[/tex]
  2. [tex]2.5 \times 2.5 \times 2.5 + x \times x = {2.5}^{3} + {x}^{2} [/tex]

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