EX3 : équations/inéquations 2nd svp.... Pergunta de ideia deFv2b

May 2019 1 38 Report

EX3 : équations/inéquations 2nd svp

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Bonjour,

1a) je te laisse developper et réduire

b) (5x-3)(5x-3-2x+2)=
   (5x-3)(3x-1)

2) résoudre E(x)>0 tableau ⇒]-∞;1/3[∪]3/5;+∞[

   résoudre E(x) = 3

   15x²-14x+3 =3
   15x²-14x+3-3 =0
   15x²-14x = 0
   x(15x-14) = 0
   15x-14 =0
   x = 14/15
   x = 0

   E(x)= (5x-3)²
   (5x-3)²-2(x-1)(5x-3) = (5x-3)²
   (5x-3)-2(x-1)(5x-3)-(5x-3)² = 0
   -2(x-1)(5x-3) = 0
   x-1 =0
   x =1
   5x-3 = 0
   x = 3/5

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Dm: fonctions affines svp

Dm: Fonctions affines, svp

Dm : fonctions affines svp

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