Ответ:
1)(х-9)(х+9)
2)х²-4х+4
3)25а²-30а+9
4)(6-m)(6+m)
5)(7m²-4n⁴)(7m+4n⁴)
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Ответ:
1)(х-9)(х+9)
2)х²-4х+4
3)25а²-30а+9
4)(6-m)(6+m)
5)(7m²-4n⁴)(7m+4n⁴)