Question

решите 2 задания,пожалуйста. на спам жалоба.

Answer 1

$1)5y+1-\frac{5y^{2}-12y }{y-2}=\frac{(5y+1)*(y-2)-(5y^{2}-12y)}{y-2}=\frac{5y^{2}-10y+y-2-5y^{2}+12y}{y-2} =\frac{3y-2}{y-2}\\\\2)\frac{a+1}{a-1}+\frac{a-1}{a+1}-\frac{6}{a^{2}-1}=\frac{a+1}{a-1}+\frac{a-1}{a+1}-\frac{6}{(a-1)(a+1)}=\frac{(a+1)*(a+1)+(a-1)(a-1)-6}{(a-1)(a+1)}=\\\\=\frac{a^{2}+2a+1+a^{2}-2a+1-6}{(a-1)(a+1)}=\frac{2a^{2}-4 }{a^{2}-1}$