Объяснение:
1) (3а-4)+(11-3а)=(3а-3а)+(-4+11)= 0 + 7 = 7
2) (6х²-4)+(5х²-10)=(6х²+5х²)+(-4-10)= 11х²+14
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Объяснение:
1) (3а-4)+(11-3а)=(3а-3а)+(-4+11)= 0 + 7 = 7
2) (6х²-4)+(5х²-10)=(6х²+5х²)+(-4-10)= 11х²+14