ПОМОГИТЕ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ПОЖАЛУЙСТА!!!!!!!!!!!!!!! Выполните:раскройте скобки и ответ
а) 2р( 1 - р -3р²) - 3р(2 - р - 2р²)=
б) 2с( 5а- 3с²) - с (а - 6с²) + 3а(а- с)=
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