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-½a²bc >> -½
0,8mx >> 0,8
x² >> 1
-a >> -1
ab >> 1
-22 >> -22
2) -½
3)0,8
4)1
5)-1
6)1
7)-22
-½a²bc a=-½ b=1 c=1
0,8mx a=0 b=0,8 c=0
x² a=1 b i c =0
-a a i c = 0 b = -a
-22 c= -22 a i b = 0