Задание за 7 класс. Разложите на множители как можно подробнее:
[tex]25x^2(x^2-1)-10x(x^2-1)+x^2-1[/tex]
[tex]25x^2(x^2-1)-10x(x^2-1)+x^2-1[/tex]
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(x^2-1)(25x^2-10x+1)=(x-1)(x+1)(5x-1)^2