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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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