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Sagot :

Bonjour

(x – 2) * (x – 2) – 1 * 1 = 0

(x - 2)^2 - 1^2 = 0

Du type : a^2 - b^2 = (a - b)(a + b)

(x - 2 - 1)(x - 2 + 1) = 0

(x - 3)(x - 1) = 0

Produit de facteur nul :

x - 3 = 0 ou x - 1 = 0

x = 3 ou x = 1

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