(x-7)^2=x^2-7
x^2-14x+49=x^2-7
x^2-x^2-14x=-7-49
-14x=-56
x=4
Ответ: 4.
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Ответ:4
(x-7)^2=x^2-7
x^2-14x+49=x^2-7
x^2-x^2-14x=-7-49
-14x=-56
x=4
Ответ: 4.