Ответ:
(x-5)^2-x^2=0
x^2-10x+25-x^2=0
-10x+25=0
-10x=-25
10x=25
x=25:10
x=2,5
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Ответ:
(x-5)^2-x^2=0
x^2-10x+25-x^2=0
-10x+25=0
-10x=-25
10x=25
x=25:10
x=2,5