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X1 1 x. X2-49=0. X2 49 0 уравнение. 49x-x^2=0. (X-1)^2=(X+1)^2.
X2-49=0. X2 49 0 уравнение. 49x-x^2=0. (X-1)^2=(X+1)^2.

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