Question

Помогите пожалуйста очень срочно ​

Answer 1

1)

$\frac{7x}{x-y} +\frac{7y}{y-x} =\frac{7x}{x-y} -\frac{7y}{x-y} =\frac{7x-7y}{x-y} =\frac{7(x-y)}{x-y} =7$

2)

$\frac{5p+a}{p^{2}a} +\frac{p-5a}{pa^{2}} =\frac{a(5p+a)}{p^{2}a^{2}} +\frac{p(p-5a)}{p^{2}a^{2}} =\frac{5ap+a^{2}}{p^{2}a^{2}} +\frac{p^{2}-5ap}{p^{2}a^{2}} =\frac{5ap+a^{2}+p^{2}-5ap}{p^{2}a^{2}} =\frac{a^{2}+p^{2}}{p^{2}a^{2}}$