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Sagot :

Réponse :

Explications étape par étape

(a + b)^2 = a^2 + 2ab + b^2

(a - b)^2 = a^2 - 2ab + b^2

(a - b)(a + b) = a^2 - b^2

Bonsoir

Developper réduire et ordonner :

H = (x + 5)^2

H = x^2 + 10x + 25

I = (4x + 6)^2

I = 16x^2 + 48x + 36

J = (x - 5)^2

J = x^2 - 10x + 25

K = (3x - 7)^2

K = 9x^2 - 42x + 49

L = (y + 3)(y - 3)

L = y^2 - 9

M = (2x + 5)(2x - 5)

M = 4x^2 - 25

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