Задание 1.

Упростите выражения:

1. (с^2 + 1)(с^2 - 1)(^с4 + 1)

2. 2(x + 3)^2 - (x - 1)^2



Задание 2.

Решите уравнение: х(х - 1) - (х - 5)^2=2
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