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Ответ

Ответ дан
mixailmark0909

1)(x+11)^2-x^2=11;

(x+11-x)(x+11+x)-11=0;

11*(2x+11)-11=0;

22x+121-11=0;

22x+110=0;

22x=-110;

x=-110/22;

x=5.

Ответ:5.

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