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Sagot :

Réponse :

Explications étape par étape

Bonsoir

Developper :

4x^2(x/2 + 3/4) - 2x^2 (x/2 - 3/4)

= 4x^3/2 + 3x^2 - 2x^3/2 + 3x^2/2

= 2x^3/2 + 9x^2/2

(-4x + 3)(x - 5) - 2(x + 2)(x - 2)

= -4x^2 + 20x + 3x - 15 - 2(x^2 - 4)

= -4x^2 + 23x - 15 - 2x^2 + 8

= -6x^2 + 23x - 7

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

= 2x + 3 + x^2 - 6x + 9

= x^2 - 4x + 12

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