Ответ:
1) 9+6b+b2
2)a2-20a+100
3)25a2+40ab+16b2
4)0,36x2-24xy+400y2
5)a2+3a3+a6
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Ответ:
1) 9+6b+b2
2)a2-20a+100
3)25a2+40ab+16b2
4)0,36x2-24xy+400y2
5)a2+3a3+a6