ДАМ 40 БАЛЛОВ
Упростите выражение.

а) (x – 3) (x – 7) – 2x (3x – 5); в) 2 (m + 1)2 – 4m.

б) 4a (a – 2) – (a – 4)2;

Разложите на множители.

а) х3 – 9х;

Разложите на множители.

а) 16х4 – 81;
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