Question

(X-1)(X-2)^3+(1-X)(X-3)^3=13X-13

Answer 1

3х - 3 * 3х- 6 + 3 - 3х * 3х  - 9 = 13х - 13 
3х * 3х - 3х * 3х - 13х = - 13 + 3 + 6 - 3 + 9
5х = 22
х = 22 / 5 
х = 4, 4 вроде так