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Sagot :

SKABETIX

Bonjour,

Rappel sur les identités remarquables ❤ :

(a + b²) = a² + 2ab + b²

(a - b)² = a² - 2ab + b²

(a + b)(a - b) = a² - b²

1) (x - 2)² = x² - 4x + 4

2) x² + 2x +1 = (x + 1)²

3) x² + 6x = (x + 3)² - 9

4) x² - 4x = (x - 2)² - 4

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