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Sagot :

Réponse:

2x^2+5x+3=0

2x^2+3x+2x+3=0

xX(2x+3)+2x+3=0

(2x+3)X(x+1)=0

2x+3=0

x+1=0

x=-3/2

x=-1

x1=-1,5

x2=-1

Donc 2x^2+5x+3=0 est -1,5

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