Объяснение:
1)x2+1.2x
2)4.2x2-4.2x
3)-15x-3x2
4)14x2-21x
5)2x+10x2
6)2x2-3x+xy
7)ax-2a+3ba
8)-2a2-4ab-10a
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Объяснение:
1)x2+1.2x
2)4.2x2-4.2x
3)-15x-3x2
4)14x2-21x
5)2x+10x2
6)2x2-3x+xy
7)ax-2a+3ba
8)-2a2-4ab-10a