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Ответ:

[tex]\frac{5}{5-x}-\frac{x}{x^{2} -25}=\frac{5}{5-x}-\frac{x}{(x -5)(x+5)}=\frac{5}{5-x}+\frac{x}{(5 -x)(x+5)} =\frac{5(x+5)}{(5-x)(x+5)}+\frac{x}{(5 -x)(x+5)} =\frac{5x+25+x}{(5-x)(x+5)}}=\frac{6x+25}{25-x^{2}}}\\[/tex]

Объяснение: