Réponses

2014-01-01T18:38:35+01:00
x/1x=x+5/x+8

x/x = x + 5/x + 8

x + 5/x + 8 = 1

x + 5/x + 7 = 0

5/x = -x-7

x(-x-7) = 5

-x²+7x = 5

-x²+7x-5 = 0

delta=29

Solutions
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x1 = (-b+racine(delta))/2a = (-7+racine(29)) / -2

x2 = (-b-racine(delta))/2a = (-7-racine(29)) / -2
2014-01-01T19:11:16+01:00