bonjour
f (x) = 2 x ³ / 3 + 5 x² / 2 - 12 x + 7
f ' ( x) = 6 x² /3 + 10 x /2 - 12
f ' (x) = 2 x² + 5 x - 12
( 2 x - 3 ) ( x + 4 )
= 2 x² + 8 x - 3 x - 12
= 2 x² + 5 x - 12
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bonjour
f (x) = 2 x ³ / 3 + 5 x² / 2 - 12 x + 7
f ' ( x) = 6 x² /3 + 10 x /2 - 12
f ' (x) = 2 x² + 5 x - 12
( 2 x - 3 ) ( x + 4 )
= 2 x² + 8 x - 3 x - 12
= 2 x² + 5 x - 12
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