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Sagot :

MPOWER

Réponse :

Bonjour,

[tex](x - 3)^2 = 16\\\\\Leftrightarrow (x - 3)^2 - 16 = 0\\\\\Leftrightarrow (x - 3)^2 - 4^2 = 0\\\\\Leftrightarrow [(x - 3) - 4][(x - 3) + 4] = 0\\\\\Leftrightarrow (x - 7)(x + 1) = 0[/tex]

[tex]Or \ A \times B = 0 \Leftrightarrow A = 0 \ ou \ B = 0[/tex]

[tex]x - 7 = 0\\\\\Leftrightarrow x = 7[/tex]

[tex]x + 1 = 0\\\\\Leftrightarrow x = -1[/tex]

Donc S = {–1 ; 7}

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