Сократите дробь:a)75b^5c^3/50b^4c^4б)2b/b^2-8bв)7x-7y/x^2-y^2г)a^2-36/a^2-12a+36

[latex]frac{75b^5c^3}{50b^4c^4} =frac{3*5*5*b^5c^3}{2*5*5*b^4c^4} =frac{3b}{2c}[/latex][latex]frac{2b}{b^2-8b} = frac{2b}{b(b-8)} =frac{2}{b-8}[/latex][latex]frac{7x-7y}{x^2-y^2} =frac{7(x-y)}{(x-y)(x+y)} =frac{7}{x+y}[/latex][latex]frac{a^2-36}{a^2-12a+36}= frac{(a-6)(a+6)}{(a-6)^2} =frac{a+6}{a-6} [/latex]