Mathematics, 27.07.2019 21:10 noahah3

Démontrer que x²-4x+5=(x-2)²+1 ; en déduire que x²-4x+5=0 n'a pas de solution

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Démontrer que x²-4x+5=(x-2)²+1 ; en déduire que x²-4x+5=0 n'a pas de solution...