39b6596b-223b-4e9f-bf17-ba4ebf7fafc0 2 4 5 decimal

&[DATE] &[TIME] - &[FILENAME]

x f a x 2^* b x * + c + :

a 7 - :

b 2 :

c 9 :

x f x solve 1 - 1.2857 21 mat

check of the result:

b - b 2^4 a * c * - sqrt ± 2 a * / 1 - 1.2857 21 sys