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Sagot :

VINS

bonjour

x² + 3 x + 2

Δ = 9 - 4 ( 1 * 2) = 9 - 8 =  1

x 1 = ( - 3 - 1 ) / 2 = - 2

x 2 =  ( - 3 + 1 ) / 2 = -  1

( x + 2 ) ( x + 1 )

INEQUATION

Bonjour,

factoriser:

x²+3x+2

a= 1 , b= 3 et c= 2

delta= b²-4ac= (3)²-4(1)(2)= 1 donc > 0 alors 2 solutions

x1= (-3-1)/2= -2

x2= (-3+1)/2= -1

donc x²+3x+2 = (x+1)(x+2)

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