(13/2x-1.5)^2-(13/2x+3/2)^2=-39

问题描述:

(13/2x-1.5)^2-(13/2x+3/2)^2=-39

(13/2x-1.5)^2-(13/2x+3/2)^2=-39
(13/2x-1.5-13/2x-1.5)(13/2x-1.5+13/2x+1.5)=-39
-3*13x=-39
x=1