Réponse :
Explications étape par étape
Bonjour
Developper puis réduire l'expression Tester le résultat pour ×=0 et x=1
A=(x+2) (x+3)
A = x^2 + 3x + 2x + 6
A = x^2 + 5x + 6
A = (0 + 2)(0 + 3) = 2 * 3 = 6
A = 0^2 + 5 * 0 + 6 = 6
A = (1 + 2)(1 + 3) = 3 * 4 = 12
A = 1^2 + 5 * 1 + 6 = 1 + 5 + 6 = 12
B=(x+5)(7+x)
B = 7x + x^2 + 35 + 5x
B = x^2 + 12x + 35
B = (0 + 5)(7 + 0) = 5 * 7 = 35
B = 0^2 + 12 * 0 + 35 = 35
B = (1 + 5)(7 + 1) = 6 * 8 = 48
B = 1^2 + 12 * 1 + 35 = 1 + 12 + 35 = 48
A=(x+4 )(x-6)
A = x^2 - 6x + 4x - 24
A = x^2 - 2x - 24
A = (0 + 4)(0 - 6) = 4 * (-6) = -24
A = 0^3 - 2 * 0 - 24 = -24
A = (1 + 4)(1 - 6) = 5 * (-5) = (-25)
A = 1^2 - 2 * 1 - 24 = 1 - 2 - 24 = -25
B=(-1+x)(x-2)
B = -x + 2 + x^2 - 2x
B = x^2 - 3x + 2
B = (-1 + 0)(0 - 2) = -1 * (-2) = 2
B = 0^2 - 3 * 0 + 2 = 2
B = (-1 + 1)(1 - 2) = 0 * (-1) = 0
B = 1^2 - 3 * 1 + 2 = 1 - 3 + 2 = 0
