(x ^ 5 - 2)(x ^ 5 + 8) - (x ^ 5 + 3) ^ 2 + 26 = 1
x^10 + 6*x^5 - 16 - x^10 - 6*x^5 - 9 + 26 = 1
6*x^5 - 16 - 6*x^5 - 9 + 26 = 1
-16 -9 + 26 = 1
-25 + 26 = 1
1 = 1, ч.т.д.
(x ^ 5 - 2)(x ^ 5 + 8) - (x ^ 5 + 3) ^ 2 + 26 = 1
x^10 + 6*x^5 - 16 - x^10 - 6*x^5 - 9 + 26 = 1
6*x^5 - 16 - 6*x^5 - 9 + 26 = 1
-16 -9 + 26 = 1
-25 + 26 = 1
1 = 1, ч.т.д.