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Sagot :

MAUDMARINE

Bonjour

Factoriser les expressions suivantes.

a. F(x) = (x-5)(2x+5)-(x-4)(x-5).

f (x) = (x - 5) [(2x + 5) - (x - 4)]

f (x) = (x - 5) (2x + 5 - x + 4)

f (x) = (x - 5) (x + 9).

MAIKO

Réponse:

F(x)= (x-5)-5(2x+5)-x(x-5)+4(x-5)

= 2+9−5−45

= (+9)−5(+9)

= (−5)(+9)

Donc F(x)= (x-5)(x+9)

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