(х ^2 - 6 х)^2+2 *(х-3)^2=81
(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.
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(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.