Réponses

2013-04-10T21:09:21+02:00

6t²+4t-15t-10 - (t² +12t +36)

= 6t² +4t -15t -10 -t² -12t-36

= 5t² -23t -46

 

(5-2y) - (-3y+7)

= 5-2y+3y-7

=y -2