Divide into multipliers

Question

Divide into multipliers

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Answer 1

Решите задачу:

Answer 2

A^4 + a^2 + 1 = a^4 + 2a^2 + 1 - a^2 = (a^2 + 1)^2 - a^2 = (a^2 + 1 - a)(a^2 + 1 + a)