April 2019 1 70 Report

Bonjour !

On considère l'expression : E = 9X au carré - 25 + (3X - 5 ) (2X + 15).

1) Développer et reduire l'expression E.

2) a. Factoriser 9X au carré - 25.

b. En déduire une factorisation de E.

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