Question

решите уравнение:

 

(5х-1)(5х+1)-25(х-2)^2=1

Answer 1

25x^2-1-25(x^2-4x+4)=1,

25x^2-1-25x^2+100x-100=1,

100x=102,

х=102:100,

х=1,02

Answer 2

(5х-1)(5х+1)-25(х-2)^2=1

((5х)^2-1)-25(x^2-4x+4)=1

25x^2-1-25x^2+100x-100=1

100x=1+101

100x=102

x=1,02

Ответ: х=1,02