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Sagot :

VINS

bonjour

f (x) = 2 x² - 2 x+ 3

α = 2 / 4 = 1 /2

β = 2 * (1/2)² - 2 *1/2 + 3 = 2/4 - 2/2 + 3 = 2/4 - 4/4 + 12/4 =  10/4 = 5 /2

f (x) = 2 ( x - 1/2 )² + 5/2

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