Объяснение:
1. b
2. 16b²-9a²
3. 25x⁴-y²
4. 1/169 x⁴-25y⁴
5.
6.
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Объяснение:
1. b
2. 16b²-9a²
3. 25x⁴-y²
4. 1/169 x⁴-25y⁴
5.
6.