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Qqun
@Qqun
April 2019
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Calculer à l'aide d'identités remarquables
1/4*[((-2)+(-3))²-[((-2)-(-3))²]]
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Verified answer
Tu observe une différence de 2 carrés
(-2)+(-3)
et
(-2)-(-3)
soit
1/4 x [(-2)+(-3) + (-2)-(-3)].[(-2)+(-3) - ((-2)-(-3))]
soit
1/4 x [2*(-2)].[(-3)*2]
soit
1/4 x [-4].[-6]
soit 24/4
soit 6
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Verified answer
Tu observe une différence de 2 carrés(-2)+(-3)
et
(-2)-(-3)
soit
1/4 x [(-2)+(-3) + (-2)-(-3)].[(-2)+(-3) - ((-2)-(-3))]
soit
1/4 x [2*(-2)].[(-3)*2]
soit
1/4 x [-4].[-6]
soit 24/4
soit 6