4a+19a ,15ab-12ab , (2x+2y+1) - (4x+y-1), Multumesc!


Răspuns :

4a+19a=23a
15ab-12ab=3ab
(2x+2y+1)-(4x+y-1)=2x+2y+1-4x-y+1=-2x+y+2      
23a
3ab
2x+2y+1-4x-y+1= -2x+y+2