Объяснение:
1)
(9m³+5p²n)²=81m^6+90m³p²n+25p^4n²
2)
(5a²-2b^4)²=25a^4-20a²b^4+4b^8
3)
(4a-3a²)²=16a²-24a³+9a^4
4)
(9m³-5p²n²)²=81m^6-90m³p²n²+25p^4n^4
5)
(5a²+2b^4)²=25a^4+20a²b^4+4b^8
