HELP ME,PLEAS ^  ^ Представьте в виде произведения 
а) 16(3а+1)²-9а²=

б) 64х²-9(2х-3)²=

в) 4(2р-3)²-25р²=

г) 49m²-9(2m-5)²=

рабочая тетрадь Миндюк Шлыков
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