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Nicolas1501
@Nicolas1501
May 2019
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Bonjour pouvez vous m'aider,merçi:
-Déterminer les formes canoniques de :
x²-8x+5
2x²+28x+86
5x²-8x+4
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Commentaires (6)
Bonjour
x² - 8 x + 5
= ( x² - 8 x + 16 - 16) + 5
=
( x - 4)² - 11
2 x² + 28 x + 86
= 2 ( x² + 14 x ) + 86
= 2 ( x² + 14 x + 49 - 49 ) + 86
= 2 ( x + 7)² - 49 + 86
=
2 ( x + 7)² + 37
essaie de faire le dernier
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x² - 8 x + 5
= ( x² - 8 x + 16 - 16) + 5
= ( x - 4)² - 11
2 x² + 28 x + 86
= 2 ( x² + 14 x ) + 86
= 2 ( x² + 14 x + 49 - 49 ) + 86
= 2 ( x + 7)² - 49 + 86
= 2 ( x + 7)² + 37
essaie de faire le dernier