Bonsoir,j'aurais besoin d'aide pour un exercice : On considère l'expression A =2 + -3 Calculez A po.... Pergunta de ideia deLeagald

Leagald @Leagald

April 2019 1 43 Report

Bonsoir,j'aurais besoin d'aide pour un exercice :
On considère l'expression A =2 $x^{2}$ + $x$ -3

Calculez A pour:
a) $x$ = -3 b) $x$ = $\frac{1}{2}$ c) $x = \sqrt{5}$
d) $x = - \sqrt{3}$

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Bilal54 Bonsoir,

a) 2 * (-3)² + 3 - 3 = 2 * 9 + 3 * 3 = 18 + 3 * 3 = 18

b) 2 * (1/2)² + 1/2 - 3 = 1 + 1/2 - 3 = 0.5 + 0.5 - 3 = -2

c) 2 * (V5)² + V5 - 3 = 2 * 5 + V5 - 3 = 7 + V5 V = racine carré.

d) 2 * (-V3)² + -(V3) - 3 = 2 * -3 - V3 - 3= -9 - V3

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