January 2021 0 134 Report
Bonjour, mon problème est le suivant f(x) = 2(x+1)^2-(x+1)(7x-13)

Montrer que f(x) = -5x^2+10x+15
Factoriser f(x) ou l'on montre que f(x)= 5(x+1)(-x+3)
Pour finir montrer que f(x) = -5(x-1)^2+20

Merci infiniment !
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