Объяснение:
[tex](a+b)*(\frac{1}{a}-\frac{1}{b}):\frac{a^2-b^2}{a^2b^2} =\frac{(a+b)*(b-a)}{ab} *\frac{a^2b^2}{a^2-b^2}=-\frac{(a+b)*(a-b)*ab}{(a+b)*(a-b)}=-ab=\\=-(2,5* (-2))=-(-5)=5.[/tex]
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Объяснение:
[tex](a+b)*(\frac{1}{a}-\frac{1}{b}):\frac{a^2-b^2}{a^2b^2} =\frac{(a+b)*(b-a)}{ab} *\frac{a^2b^2}{a^2-b^2}=-\frac{(a+b)*(a-b)*ab}{(a+b)*(a-b)}=-ab=\\=-(2,5* (-2))=-(-5)=5.[/tex]