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Sagot :

AYUDA

bjr

(x+2)² - (x-3) (x+3) ≥ 0

je développe..

(x+2)² - (x² - 9) ≥ 0

x² + 4x + 4 - x² + 9 ≥ 0

4x + 13 ≥ 0

x ≥ -13/4

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