Réponses

2012-12-29T00:27:46+01:00

On développe :

(-7t+8)(3-5t) = (-7t)*3 + (-7t)*(-5t) + 8*3 + 8*(-5t) = -21t + 35t² + 24 -40t = 35t² - 61t + 24

 

 

2012-12-29T00:29:13+01:00

Bonjour,

 

(-7t+8)(3-5t) =

 

-21t+35t²+24-40t=

 

35t²-61t+24

 

J'espère que tu as compris

a+