Ответ:
Объяснение:
(5m-2n)(3m+5n)-(2.5m-3n)(4m+8n)=15m²+25mn-6mn-10n²-10m²-20mn+12mn+24n²=5m²+11mn+14n²
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Ответ:
Объяснение:
(5m-2n)(3m+5n)-(2.5m-3n)(4m+8n)=15m²+25mn-6mn-10n²-10m²-20mn+12mn+24n²=5m²+11mn+14n²