October 2020 0 215 Report
Bonjour ! J'aimerais de l'aide pour résoudre ce minuscule problème : a = 1
b = 7
c = -2

On sait que :

x + y = -b/a
x*y = c/a

Combien vaut :

x^2 + y^2 ?

Merci d'avance !
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