Ответ:
1)(3a2+b)2=9a4+6a2b+b2
2)(2a-9b4)2=4a2-36ab4+81b8
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Ответ:
1)(3a2+b)2=9a4+6a2b+b2
2)(2a-9b4)2=4a2-36ab4+81b8