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Loane14
@Loane14
April 2019
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Verifier que √5 -1 est une solution de l'équation: ϰ²+2ϰ-4=0
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Verified answer
(√5 - 1)² + 2(√5 - 1) - 4
= 5 - 2√5 + 1 + 2√5 - 2 - 4
= 5 - 4 + 1 - 2 - 2√5 + 2√5
= 0
Donc c'est juste.
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Verified answer
(√5 - 1)² + 2(√5 - 1) - 4= 5 - 2√5 + 1 + 2√5 - 2 - 4
= 5 - 4 + 1 - 2 - 2√5 + 2√5
= 0
Donc c'est juste.