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lam84mdr
@lam84mdr
January 2021
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Bonsoir !!! J'ai un DM de maths à faire et je bloque pour la b de l'exo 1 ! Qui est "Exprimer sous forme de fraction irréductible : 2-5(7/5-1)exposant2" quelqu'un pourrait m'aider svp ?
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maudmarine
Verified answer
Bonjour,
Exprimer sous forme de fraction irréductible
:
2 - 5 (7/5 - 1)²
= 2 - 5 (7/5 - 1 x 5 / 1 x 5)²
= 2 - 5 (7/5 - 5/5)²
= 2 - 5 (2/5)²
= 2 - 5 (2²/5²)
= 2 - 5 (4/25)
= 2 - 20/25
= 2 x 25 / 1 x 25 - 20/25
= 50/25 - 20/25
= 30/25
= 5 x 6 / 5 x 5
= 6/5
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Verified answer
Bonjour,Exprimer sous forme de fraction irréductible :
2 - 5 (7/5 - 1)²
= 2 - 5 (7/5 - 1 x 5 / 1 x 5)²
= 2 - 5 (7/5 - 5/5)²
= 2 - 5 (2/5)²
= 2 - 5 (2²/5²)
= 2 - 5 (4/25)
= 2 - 20/25
= 2 x 25 / 1 x 25 - 20/25
= 50/25 - 20/25
= 30/25
= 5 x 6 / 5 x 5
= 6/5