Soit f la fonction telle que f(x)= (5x-4)²-49
1) Développer, réduire et ordonner l'expression de f(x).
2) Factoriser l'expression de f(x).
Aidez moi svp :)
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Bonjour,
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2)![f(x) = (5x-4)^2-49\\ f(x) = \left[\left(5x-4\right)+7\right]\left[\left(5x-4\right)-7\right]\\ f(x) = \left(5x+3\right)\left(5x-11\right) f(x) = (5x-4)^2-49\\ f(x) = \left[\left(5x-4\right)+7\right]\left[\left(5x-4\right)-7\right]\\ f(x) = \left(5x+3\right)\left(5x-11\right)](https://tex.z-dn.net/?f=f%28x%29+%3D+%285x-4%29%5E2-49%5C%5C+f%28x%29+%3D+%5Cleft%5B%5Cleft%285x-4%5Cright%29%2B7%5Cright%5D%5Cleft%5B%5Cleft%285x-4%5Cright%29-7%5Cright%5D%5C%5C+f%28x%29+%3D+%5Cleft%285x%2B3%5Cright%29%5Cleft%285x-11%5Cright%29)