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Sagot :

Réponse :

Explications étape par étape

Bonjour

(x + 2)(x - 3) = x^2 - 3x + 2x - 6 = x^2 - x - 6

x^2 - 25 = x^2 - 5^2 = (x - 5)(x + 5)

(x + 8)^2 = x^2 + 2 * x * 8 + 8^2 = x^2 + 16x + 64

(x - 1)^2 = x^2 - 2 * x * 1 + 1^2 = x^2 - 2x + 1

4x(5x - 3) = 4x * 5x + 4x * (-3) = 20x^2 - 12x

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