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Sagot :

VINS

bonsoir

x² - 5 x + 6

α = 5 /2 = 2.5  

β = 2.5² - 5 *2.5 + 6 = 6.25 - 12.5 + 6 = - 0.25

forme canonique  = ( x - 2.5 )² - 0.25

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

= ( x - 4 ) ( x - 2 )

R (x) = 0   S  = { 2 ; 4 }

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