(х ^2 - 6 х)^2+2 *(х-3)^2=81

Question

(х ^2 - 6 х)^2+2 *(х-3)^2=81

Answer 1

(х^2-6x)^2+2*(x-3)^2=81;

(x-79)(x-6)(x+6)(x-3)(x+3)=0;

x=79;6;-6;3;-3.