/ 2 \ 3 (7*x - 3)*\49*x + 21*x + 9/ - 343*x - 2*x + 17
(7*x - 1*3)*(49*x^2 + 21*x + 9) - 343*x^3 - 2*x + 17
(7*x - 1*3)*(49*x^2 + 21*x + 9) - 343*x^3 - 2*x + 17 при x = 1/3
подставляем
/ 2 \ 3 (7*x - 3)*\49*x + 21*x + 9/ - 343*x - 2*x + 17
-10 - 2*x
переменные
x = 1/3
-10 - 2*(1/3)
-10 - 2*1/3
-32/3
-32/3
17.0 - 2.0*x - 343.0*x^3 + (-3.0 + 7.0*x)*(9.0 + 21.0*x + 49.0*x^2)
17.0 - 2.0*x - 343.0*x^3 + (-3.0 + 7.0*x)*(9.0 + 21.0*x + 49.0*x^2)