(z-2)^3-z^2(z-6)=13z-7

Question

(z-2)^3-z^2(z-6)=13z-7

Answer 1

(z-2)^3-z^2(z-6)=13z-7

z^3+8-6z-z^3+6z^2=13z-7

z^3-6z-z^3+6z^2-13z=-7-8

-13z=-15

z=15/13

Ответ: z=15/13