11. a) 2y-5x²+51-18x²-2y+3x²-50-5x+10x²=
=-5x²+0+1-5x=-10x²+5x+1
asa l-am rezolvat
acum vedem ce avem cu x²
-5x²-18x²+3x²+10x²=(-5-18+3+10)x²=-10x²
reducem tot ce avem cu y:
2y-2y=0
reducem numerele
+51-50=+1
b)2/5ax+ax²-1/10ax-a²x-0,1ax+a²-2/3a²+ax=1,2ax+ax²-a²x+a²/3
reducem ce avem cu ax
2/5ax-1/10ax-0,1ax+ax=0,4ax-0,1ax-0,1ax+1ax=1,2ax
reducem ce avem cu a²
a²-2/3a²=3a²/3-2a²/3=a²/3
daca nu te ajuta sterge-l
