Ответ:
5) х²/16 + xy/6 + y²/9
6) 49m²/9 + 7mn + 9n²/4
7) 25m² + n²/4 - 5mn
8) 81p² + q²/9 - 6pq
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Ответ:
5) х²/16 + xy/6 + y²/9
6) 49m²/9 + 7mn + 9n²/4
7) 25m² + n²/4 - 5mn
8) 81p² + q²/9 - 6pq