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Sagot :

NEMY24

Bonjour :)

Explications étape par étape:

(x + 3 ) ² = x² - 2x

x² +6x + 9 = x² - 2x

x²+ 6x + 9 - x² + 2x = 0

8x = -9

x = -9/8

S = {-9/8}

[tex] \frac {2}{5} x + 8 = \frac {1}{3} x - \frac {7} {3}

[/tex]

[tex] \frac {2}{5} x - \frac {1}{3} x = - \frac {7} {3} - \frac {24} {3} [/tex]

[tex] \frac {1}{15} x = - \frac {31} {3} [/tex]

[tex] 3x = -465 [/tex]

[tex] x = -155 [/tex]

S = { -155 }

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